Journal articles: 'Spectral Studies of Cadmium(II)'

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N., Kalarani, Angumeenal AR., Kamalakannan P., and Venkappayya D. "Synthesis and characterization of piperazino-bis(methylantipyrine) and its complexes with chromium(III), manganese(II), cobalt(II), copper(II), zinc(II) and cadmium(II) ions." Journal of Indian Chemical Society Vol. 82, May 2005 (2005): 404–10. https://doi.org/10.5281/zenodo.5829979.

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Department of Chemistry, National Institute or Technology, Tiruchirappalli-620 015, India School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur-613 402. India E-mail : angum@nitt.edu Manuscript received 3 September 2003, revised 23 June 2004, accepted 2 February 2005 A new Mannich base, piperazino-his(methylantipyrine) (PBMA), was synthesized and characterized by spectral studies. Chelates of PBMA with chromium(III), manganese(ll), cobalt(II), copper(II), zinc(II) and cadmium(II) ions were prepared and characterized by elemental analyses and IR, UV and 1H NMR spectral studies. PBMA was found to act as a bidentate ligand bonding through one of the carbonyl oxygens of antipyrine and one of the C-N-C groups of piperazine moiety. Based on the magnetic moment values and UV-Vis spectral data, trigonal bipyramidal geometry for· chromium(lll), distorted octahedral geometry for copper(II) chloro and bromo complexes and tetrahedral geometry for cobalt(II), zinc(II) and cadmium(ll) chloro and bromo complexes were assigned. TG and DTA studies show a double stage decomposition pattern for PBMA and its chromium(lll), cobalt(II) and cadmium(II) chloro complexes and a single stage decomposition pattern for zinc(ll) bromo complex. The kinetic and thermodynamic parameters for the thermal decomposition of the metal chelates were evaluated using equations based on integral methods. The antimicrobial studies show that the zinc(ll) complexes arc more active than the other complexes.

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M R Prathapachandra Kurup, Jinsa Mary Jacob. "Synthesis and Spectral Aspects of Mixed Ligand Cadmium (II) Chelates of an ONS Donor Thiosemicarbazone." Mapana - Journal of Sciences 14, no. 2 (2017): 1–9. http://dx.doi.org/10.12723/mjs.33.1.

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Cadmium(II) complexes have been synthesized by the reaction of cadmium(II) acetate with an ONS donor thiosemicarbazone and heterocyclic bases like 1,10- phenanthroline, 2,2’ -bipyridine as coligands. They were physico-chemically characterized by CHNS analyses, conductivity measurements, infrared and electronic spectral studies.

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A.O. Younes, Ayman, Amnah Mohammed Alsuhaibani, and Moamen S. Refat. "Preparation, spectroscopic and thermal studies on the zinc(II), cadmium(II), tin(II), lead(II) and antimony(III) creatinine complexes." Bulletin of the Chemical Society of Ethiopia 36, no. 4 (2022): 831–42. http://dx.doi.org/10.4314/bcse.v36i4.9.

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ABSTRACT. Zinc(II), cadmium(II), tin(II), lead(II) and antimony(III) complexes of creatinine with the composition of [M(creat)2Xn].xH2O, (X = Cl or NO3; n = 2-6) were prepared. The complexes were characterized by analytical and spectral methods. The analysis of FT-IR and Raman spectra helps to understand the coordination properties of the creatinine ligand and to determine the probable structure of the complexes. The shift in the resonances of cyclic NH proton in the 1H NMR when compared to the ligand indicated that cyclic nitrogen coordinates. Conductivity measurements in DMSO suggested that the complexes are non-electrolytes. Thermal decomposition behavior of the complexes was also discussed.  KEY WORDS: Creatinine, TGA/DTA, Metal complexation, Raman spectroscopy  Bull. Chem. Soc. Ethiop. 2022, 36(4), 831-842.  DOI: https://dx.doi.org/10.4314/bcse.v36i4.9

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Nidhi, Kalgotra, Andotra Savit, Kumar Sandeep, Gupta Bhawana, and K. Pandey Sushil. "Synthesis, spectral, electrochemical, thermal and biological studies of benzyl/tolylxanthates of cadmium(II)." Journal of Indian Chemical Society Vol. 94, Aug 2017 (2017): 839–56. https://doi.org/10.5281/zenodo.5595117.

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Department of Chemistry, University of Jammu, Baba Sahib Ambedkar Road, Jammu-180 006, Jammu & Kashmir, India E-mail : kpsushil@rediffmail.com Manuscript received online 17 April 2017, accepted 15 June 2017 New dithiocarbonates of cadmium(II) corresponding to [(ArOCS2 )2Cd], [(ArOCS2 )M{S2POCH2C(CH3)2CH2O}] and [(ArOCS2) 2Cd.nL] (Ar = o-, m-, p-CH3C6H4 /C6H5CH2 ), L = N2C12H8 , N2C10H8 ; n = 2, L = NC5H5 , P(C6H5 )3 have been isolated by the reaction of sodium salt of dithiocarbonates with cadmium dichloride in 1 : 2 molar ratio, mixed ligand complex in 1 : 1 : 1 molar ratio by the reaction of dithiocarbonate, alkylene dithiophosphate and metal salt in aqueous medium and their adducts with phosphorous and nitrogen donor ligand in 1 : 1 and 1 : 2 molar ratio. These complexes have been characterized by elemental analyses, mass, IR and heteronuclear NMR (1H, 31P and 13C) spectroscopic analysis. Thermal and redox properties of complexes were studied by thermogravimetric analysis and cyclic voltammetry. These studies confirm that in the nitrogen and phosphorous donor complexes the geometry around the cadmium metal centre is distorted octahedral, and in the parent cadmium dithiocarbonate complex it is distorted tetrahedral. The dithiocarbonate ligands and some selected complexes were screened against Fusarium oxysporum shows that the free ligands reveal significantly less activity compared to the corresponding cadmium complexes.

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P., K. SHARMA, and N. DUBEY S. "Synthesis and Spectral Studies of Cadmium(II) Complexes with N-Salicylidene- and N-(2-Hydroxy-1-naphthylidene)amino Acids." Journal of Indian Chemical Society Vol. 72, Sep 1995 (1995): 577–79. https://doi.org/10.5281/zenodo.5909230.

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Department of Chemistry, Kurukshetra University, Kurukshetra-132 119 Manuscript received 22 June 1993, accepted 17 February 1994 A new series of six-coordinated complexes of CdII with N-salicylidene- and N-(2-hydroxy-1-naphthylidene)amino acids has been prepared. Spectroscopic investigations have shown that ligands are coordinated to the metal ions in a terdentate manner with O,N,O donor site. Metal ions function as a trap for Schiff base intermediates, which facilitate the formation and isolation of metal derivatives.

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L., K. Mishra, Jha Y., K. Sinha B., K. Saxena M., and Singh Rajeshwar. "Studies on coordination compounds of manganese-, cobalt-, nickel-, copper-, zinc- and cadmium(II) with urazine." Journal of Indian Chemical Society Vol. 76, Feb 1999 (1999): 98–100. https://doi.org/10.5281/zenodo.5852353.

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Chemistry Department, Science College, Patna-800 005, India Chemistry Department, P.G.M.U., Bodh Gaya-824 234, India Chemistry Department, Nalanda College, Biharsharif-803 101, India Manuscript received 1 December 1997, revised 5 June 1998, accepted 22 July 1998 Complexes of urazine (H-Uz) with bivalent metals having composition M(Uz)2nH2O(where M=Mn, Co, Ni, Cu, Zn or Cd; n = 4, 3 or 2) have been prepared and characterised by elemental analysis, physical and spectral data

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Baljit, Singh, and Bala Kanchan. "Electrochemical reactions at sacrificial electrodes : Direct electrochemical synthesis of cadmium(II) alkoxides and their coordination compounds." Journal of Indian Chemical Society Vol. 88, Feb 2011 (2011): 271–73. https://doi.org/10.5281/zenodo.5773486.

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Department of Chemistry, Punjabi University, Patiala-147 002, Punjab, India E-mail : baljit_chemz@yahoo.co.in Manuscript received 06 October 2009, revised 02 June 2010, accepted 14 June 2010 Electrochemical reactions of hexan-1-ol, heptan-1-ol, octan-1-ol, nonan-1-ol, decan-1-ol at sacrificial cadmium anode and inert platinum cathode yield cadmium(ll) alkoxides, Cd(OR)2, using acetonitrile as solvent and tetrabutylammonium chloride as supporting electrolyte. On refluxing with 2,2'-bipyridyl (L) these alkoxides do not form coordination compounds. However, compounds with general formula Cd(OR)2.L have been isolated by electrolysing the solutions of above alcohols in the presence of ligand (L) at cadmium anode. The products have been characterised by elemental analysis and infrared spectral studies. Current efficiencies of all these reactions are quite high.

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Montazerozohori, Morteza, Kimia Nozarian, and Hamid Reza Ebrahimi. "Synthesis, Spectroscopy, Theoretical, and Electrochemical Studies of Zn(II), Cd(II), and Hg(II) Azide and Thiocyanate Complexes of a New Symmetric Schiff-Base Ligand." Journal of Spectroscopy 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/718149.

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Synthesis of zinc(II)/cadmium(II)/mercury(II) thiocyanate and azide complexes of a new bidentate Schiff-base ligand (L) with general formula of MLX2(M = Zn(II), Cd(II), and Hg(II)) in ethanol solution at room temperature is reported. The ligand and metal complexes were characterized by using ultraviolet-visible (UV-visible), Fourier transform infrared (FT-IR),1H- and13C-NMR spectroscopy and physical characterization, CHN analysis, and molar conductivity.1H- and13C-NMR spectra have been studied in DMSO-d6. The reasonable shifts of FT-IR and NMR spectral signals of the complexes with respect to the free ligand confirm well coordination of Schiff-base ligand and anions in an inner sphere coordination space. The conductivity measurements as well as spectral data indicated that the complexes are nonelectrolyte. Theoretical optimization on the structure of ligand and its complexes was performed at the Becke’s three-parameter hybrid functional (B3) with the nonlocal correlation of Lee-Yang-Parr (LYP) level of theory with double-zeta valence (LANL2DZ) basis set using GAUSSIAN 03 suite of program, and then some theoretical structural parameters such as bond lengths, bond angles, and torsion angles were obtained. Finally, electrochemical behavior of ligand and its complexes was investigated. Cyclic voltammograms of metal complexes showed considerable changes with respect to free ligand.

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BALWAN, SINGH, and MISRA HARIHAR. "Cobalt(II), Nickel(II), Copper(II), Zinc(II), Cadmium(II) and Dioxouranium(II) Complexes of Thiophene-2-aldehyde-4-phenyl-thiosem icarbazone." Journal of Indian Chemical Society Vol. 63, Dec 1986 (1986): 1069–70. https://doi.org/10.5281/zenodo.6277960.

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Department of Chemistry, University of Allahabad, Allahabad 211 002 Manuscript received 30 December 1986, revised 10 April 1986, accepted 30 October 1986 Cobalt(II), Nickel(II), Copper(II), Zinc(II), Cadmium(II) and Dioxouranium(II) Complexes of Thiophene-2-aldehyde-4-phenyl-thioseicarbazone.

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Jouad, El Mostapha, Magali Allain, Mustayeen A. Khan, and Gilles M. Bouet. "Structural and spectral studies of nickel(II), copper(II) and cadmium(II) complexes of 3-furaldehyde thiosemicarbazone." Polyhedron 24, no. 2 (2005): 327–32. http://dx.doi.org/10.1016/j.poly.2004.11.010.

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M., K. Singh, Das A., Laskar R., and Paul B. "Synthesis and characterization of mixed ligand complexes of zinc and cadmium ions with some nitrogen and sulphur donors." Journal of Indian Chemical Society Vol. 86, Feb 2009 (2009): 143–48. https://doi.org/10.5281/zenodo.5808611.

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Department of Chemistry, Tripura University, Suryarnaninagar-799 130, Tnpura, India E-mail : rnaheshkurnar _singh@ rediffmail.com Manuscript received 8 September 2008, accepted 16 September 2008 Mixed ligand complexes of ZnII and CdII ions with 1-cyano-1-carboethoxyethylene-2,2-dithiolate [CED2-, {S2C= C(CN)(COOC2H5}2-] as a primary ligand and o-phenylenediamine (OPD), pyridine (py), α-picoline (α-pic), β-picoline (α-pic) or \(\gamma\)-picoline (\(\gamma\)-pic) as secondary ligands have been synthesized and characterized on the basis of analytical data, molar conductance, infrared and 1H NMR spectral studies. The molar conductance data reveal that all the complexes have non-electrolytic nature in DMF solution. Infrared spectral studies suggest bidentate chclating behaviour of CED2-. ion and OPD while other nitrogen donors show unidentate behaviour in its complexes.

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Singh, Dharam, Vandna Malik, Ramesh Kumar, Krishan Kumar, and Saurabh Dhiman. "Synthesis, characterization and antibacterial and antifungal studies of some tetraazamacrocyclic complexes." Journal of the Serbian Chemical Society 75, no. 10 (2010): 1369–80. http://dx.doi.org/10.2298/jsc100129110s.

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A new series of complexes was synthesized by template condensation of malonyl dihydrazide and glyoxal in methanolic medium in the presence of divalent cobalt, nickel, copper, zinc and cadmium salts, whereby complexes of the type: [M(C5H6N4O2)X2] where M = Co(II), Ni(II), Cu(II), Zn(II) and Cd(II), and X = Cl-, NO3- and OAc-, were formed. The complexes were characterized with the aid of elemental analyses, conductance measurements, magnetic susceptibility measurements, and electronic, NMR and infrared spectral studies. Based on these studies, a six coordinate octahedral geometry is proposed for these complexes. The complexes were tested for their in vitro antibacterial and antifungal activities. The minimum inhibitory concentration shown by complexes was compared with that of standard drugs.

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Shifera, Leta. "Equilibrium, Kinetics and Thermodynamics Studies of Cadmium (II) Ion Adsorption on to Anchote Peel (Coccinia abyssinica Peel) Activated Carbon Adsorbent." American Journal of Physical Chemistry 13, no. 2 (2024): 50–58. http://dx.doi.org/10.11648/j.ajpc.20241302.14.

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Powdered Activated Carbon Adsorbent produced from Anchote peel (Coccinia abyssinica peel). Powdered Activated Carbon Adsorbent was investigated for its adsorption capacity for Cadmium (II) ion. Effects of parameters: pH, contact time, adsorbent dose, initial metal ion concentration, and temperature on adsorption of Cadmium (II) ion were investigated. The best adsorption of Cadmium (II) ion occurred at pH 5, where the adsorption reached equilibrium within 210 min. for the optimum 0.025 mg/l initial Cadmium (II) ion concentration. Kinetic studies of the data showed that the adsorption follows the pseudo second order kinetic model where equilibrium adsorption capacities and adsorption rate increased at optimum level for all parameter. Fourier Transform Infra Red spectra of activated carbon adsorbent & Cadmium (II) ion loaded adsorbent were obtained. The enthalpy of Cadmium (II) ion adsorption was -71.986 J/mol. The negative enthalpy of adsorption indicated an exothermic nature of the adsorption. The equilibrium data better fitted Freundlich isotherm models within the temperature range 20 °C – 45 °C. Maximum adsorption efficiency of adsorbent was 98.3% of Cadmium (II) ion at pH 5 and optimum contact time 210 min., adsorbent dose 0.25 g and initial conc. 0.025 mg/l respectively. The maximum adsorption capacity of Anchote (Coccinia abyssinica) peel activated carbon adsorbent was observed to 89.273 mg/g of Cadmium (II) ion at 30 °C and 5 mg/l.

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Roy, Sunalya M., M. R. Sudarsanakumar, S. Suma, M. R. Prathapachandra Kurup, V. S. Dhanya та Remya M. Nair. "Spectral, thermal and structural studies of an acetate bridged polymeric cadmium(II) complex: Poly[aqua(μ-acetato)(4-aminobenzoato)cadmium(II) monohydrate]". Inorganic Chemistry Communications 40 (лютий 2014): 200–204. http://dx.doi.org/10.1016/j.inoche.2013.12.009.

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Gegeshidze, Nana, Nino Kilasonia, and Maia Tsintsadze. "Synthesis and Spectroscopic (IR) Studies of Complex Compounds of Some 3D Metals with N,N-dimethylformamide." Works of Georgian Technical University, no. 2(528) (May 29, 2023): 18–26. http://dx.doi.org/10.36073/1512-0996-2023-2-18-26.

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Complex compounds of sulphates and chlorides of cobalt (II), nickel (II), copper (II), manganese (II), cadmium (II) and zinc with N, N-dimethylformamide, as well as mixed acidoligand complex compounds of cobalt (II), nickel (II), manganese (II) and copper (II) with N,N-dimethylformamide were synthesized. In order to study the rules of coordination of N,Ndimethylformamide and thiocyanate groups, IR spectra of synthesized complex compounds were studied. Based on the study of IR spectra, it was found that in all synthesized complex compounds, the coordination of the N,Ndimethylformamide molecule with complexing metals is carried out by the oxygen atom of the carbonyl group. For sulfate and chloride compounds of cobalt (II), nickel (II) and manganese (II) with N, N-dimethylformamide, an octahedral structure of synthesized complexes is proposed, and in the case of copper (II) and cadmium, a tetrahedral structure.

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M., K. Singh, Das A., Laskar R., and Paul B. "Synthesis and characterization of mixed ligand complexes of zinc and cadmium ions with some nitrogen and sulphur donors." Journal of Indian Chemical Society Vol. 85, May 2008 (2008): 485–90. https://doi.org/10.5281/zenodo.5816395.

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Department of Chemistry, Tripura University, Suryamaninagar-799 130, Tripura, India E-mail : maheshkumar _ singh@rediffmail.com Manuscript received 13 February 2008, accepted 28 February 2008 Mixed ligand complexes of zinc and cadmium ions with sulphur ligand, 1,1-dicyanoethylcnc-2,2-dithiolate [i-MNT2- = {S2C : C(CN)2}2-] as a primary ligand and nitrogen donor, o-phenylenediamine (OPD), as secondary ligand of the composition M(OPD)(i-MNT) [M = ZnII or CdII ] have been synthesized. Reactions of M(OPD)(i-MNT) with pyridine bases such as pyridine (py), α-picoline (α-pic), β-picoline (β-pic) or y-picoline (y-pic) have been carried out under different reaction conditions. Some of the reactions have yielded addition compounds whereas others have resulted the compounds in which OPD has been replaced by pyridine bases. The complexes have been characterized on the basis of analytical data, molar conductance, infrared and NMR spectral studies. The molar conductance data reveal that all of the complexes have non-electrolytic nature in DMF solution. Infrared spectral studies suggest bidentate chelating behaviour of i-MNT2- ion and OPD while other ligands show unidentate behaviour in its complexes.

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CROMER, S., P. HAMBRIGHT, J. GRODKOWSKI, and P. NETA. "Tetrabenzoporphyrins: Metal Incorporation and Exchange Kinetics, Ligational Equilibria and Pulse Radiolysis Studies." Journal of Porphyrins and Phthalocyanines 01, no. 01 (1997): 45–54. http://dx.doi.org/10.1002/(sici)1099-1409(199701)1:1<45::aid-jpp3>3.0.co;2-d.

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The solution chemistry of tetrabenzoporphyrin ( TBP ) and several of its metal derivatives were compared with that of the corresponding octaethylporphyrins. Kinetic studies were done on zinc and cadmium ion incorporation and the exchange reactions of cadmium porphyrins with zinc. Formation constants of Cd (II), Cu (II), VO (IV), Ni (II), Zn (II) and Mg (II) porphyrins with pyridine were determined for both compounds. The spectra of the radical cations of Ni (II), Mg (II) and H 2- TBP were obtained, as well as that of the radical anion of Mg (II)- TBP . Aside from the new Ni (I)- TBP , no long-lived intermediates, as noted with other porphyrins, were observed upon reduction of the tetrabenzoporphyrins. The low basicity and rigidity of the tetrabenzoporphyrin nucleus may explain many of its relative reactivity properties.

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Journal, Baghdad Science. "Spectroscopic Characterization and Antimicrobial Activities of Some Heavy Metals Complexes of 2-hydroxy phenyl piperonalidene." Baghdad Science Journal 10, no. 3 (2013): 627–37. http://dx.doi.org/10.21123/bsj.10.3.627-637.

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An antibacterial and antifungal piperonal-derived compound and its Rh(III), Pd(II), Pt(IV), and Cd(II) metal complexes were synthesized and characterized by spectroscopic methods, conductivity, metal analyses and magnetic moment measurements. The nature of the complexes formed in ethanolic solution was studied following the molar ratio method. From the spectral studies, octahedral geometry was suggested for rhodium (III) and platinum (IV) complexes, while a square planer structure was suggested for palladium (II) complex and a tetrahedral geometry for cadmium (II) complex. Structural geometries of these compounds were also suggested in gas phase by using hyperchem-8 program for the molecular mechanics and semi-empirical calculations. The heat of formation and binding energy for the prepared compounds was calculated by using PM3 and AMBER methods. The theoretically vibration spectra for the imine and its starting material was evaluated by using PM3 method. Preliminary in vitro tests for antibacterial and antifungal activity showed that most of the prepared compounds display a good activity to (Staphylococcus aureus), (Escherichia coli) and (Candida albicans).

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Alias, Mahasin Faisal, Israa Qais Yousif, and Sura Kalil Ibrahim. "Spectroscopic Characterization and Antimicrobial Activities of Some Heavy Metals Complexes of 2-hydroxy phenyl piperonalidene." Baghdad Science Journal 10, no. 3 (2013): 627–37. http://dx.doi.org/10.21123/bsj.2013.10.3.627-637.

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An antibacterial and antifungal piperonal-derived compound and its Rh(III), Pd(II), Pt(IV), and Cd(II) metal complexes were synthesized and characterized by spectroscopic methods, conductivity, metal analyses and magnetic moment measurements. The nature of the complexes formed in ethanolic solution was studied following the molar ratio method. From the spectral studies, octahedral geometry was suggested for rhodium (III) and platinum (IV) complexes, while a square planer structure was suggested for palladium (II) complex and a tetrahedral geometry for cadmium (II) complex. Structural geometries of these compounds were also suggested in gas phase by using hyperchem-8 program for the molecular mechanics and semi-empirical calculations. The heat of formation and binding energy for the prepared compounds was calculated by using PM3 and AMBER methods. The theoretically vibration spectra for the imine and its starting material was evaluated by using PM3 method. Preliminary in vitro tests for antibacterial and antifungal activity showed that most of the prepared compounds display a good activity to (Staphylococcus aureus), (Escherichia coli) and (Candida albicans).

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Selvakumar, Puthiya Nayagam, Veeraghava Perumal Subbulakshmi, and Poornachari Subramanian. "An EPR and Optical Study of VO2+ in Bis (Glycine) Cadmium Chloride Single Crystals." Zeitschrift für Naturforschung A 62, no. 7-8 (2007): 462–66. http://dx.doi.org/10.1515/zna-2007-7-817.

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Results of EPR and optical studies of VO2+ doped in bis (glycine) cadmium(II) chloride, belonging to a third site as a substitutional one are reported. The spin Hamiltonian parameters obtained for the site are gzz= 1.9159, gyy= 1.9695, gxx= 1.9853, Azz= 210.4 G, Ayy= 109.8 G, and Axx= 107.0 G. By correlating the EPR and spectral data, the molecular orbital bonding parameters have been evaluated.

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Castiñeiras, Alfonso, Elena Bermejo, Douglas X. West, Lily J. Ackerman, Jesús Valdés-Martı́nez, and Simon Hernández-Ortega. "Structural and spectral studies of 1-phenylglyoxal bis(3-piperidylthiosemicarbazone) and its zinc(II), cadmium(II) and platinum(II) complexes." Polyhedron 18, no. 10 (1999): 1463–69. http://dx.doi.org/10.1016/s0277-5387(99)00006-6.

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González-Albarrán, René, Josefina de Gyves, and Eduardo Rodríguez de San Miguel. "Determination of Cadmium (II) in Aqueous Solutions by In Situ MID-FTIR-PLS Analysis Using a Polymer Inclusion Membrane-Based Sensor: First Considerations." Molecules 25, no. 15 (2020): 3436. http://dx.doi.org/10.3390/molecules25153436.

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Environmental monitoring is one of the most dynamically developing branches of chemical analysis. In this area, the use of multidimensional techniques and methods is encouraged to allow reliable determinations of metal ions with portable equipment for in-field applications. In this regard, this study presents, for the first time, the capabilities of a polymer inclusion membrane (PIM) sensor to perform cadmium (II) determination in aqueous solutions by in situ visible (VIS) and Mid- Fourier transform infrared spectroscopy (MID-FTIR) analyses of the polymeric films, using a partial least squares (PLS) chemometric approach. The influence of pH and metal content on cadmium (II) extraction, the characterization of its extraction in terms of the adsorption isotherm, enrichment factor and extraction equilibrium were studied. The PLS chemometric algorithm was applied to the spectral data to establish the relationship between cadmium (II) content in the membrane and the absorption spectra. Furthermore, the developed MID-FTIR method was validated through the determination of the figures of merit (accuracy, linearity, sensitivity, analytical sensitivity, minimum discernible concentration difference, mean selectivity, and limits of detection and quantitation). Results showed reliable calibration curves denoting systems’ potentiality. Comparable results were obtained in the analysis of real samples (tap, bottle, and pier water) between the new MID-FTIR-PLS PIM based-sensor and F-AAS.

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Musa, Taghreed Mohy Al-Deen, Mahmoud Najim Abid Aljibouri, Bayader Fadhil Abbas, and Nahid Hasani. "Synthesis, Spectroscopic and Computational Studies of Some Metals Chelates with Chromene-2-one and Pyrazine-Based Ligands." Indonesian Journal of Chemistry 20, no. 1 (2019): 160. http://dx.doi.org/10.22146/ijc.43857.

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The present paper deals with the synthesis of cobalt(II), nickel(II), copper(II) and cadmium(II) complexes with two bidentate ligands, L1 (3-(quinoxaline-2-yl)-coumarin) and L2 (2-methylene-2H-chromene-3-(methyl carbonimidic)thioanhydride). The L1 ligand was prepared by treating w-bromo-3-acetylcoumarin with 1,2-phenylenediamine whereas the ligand L2 was prepared through substitution reaction ofw-bromo-3-acetylcoumarin with potassium thiocyanate in ethanol medium. The confirmation of the structures for L1 and L2 were done by (C.H.N.S.) elemental analysis, FT-IR, NMR and mass spectra. The metal complexes of cobalt(II), nickel(II), copper(II) and cadmium(II), with L1 and L2, were prepared and isolated in the solid state then characterized by (C.H.N.M) elemental analysis, proton and carbon-13 NMR, FT-IR and mass spectra. Furthermore, the thermal analysis (TG-DSC) for some complexes assisted us in the elucidation of the suggested structures of complexes and confirmed their thermal stability. The results obtained from elemental analysis, magnetic susceptibility and thermal analysis confirmed that all metal complexes were formed in 2:1 molar ratio of ligand to metal with octahedral structures except cadmium(II) complexes which were in a tetrahedron geometry with 1:1 mole ratio. The complexes are found to be soluble in DMF and DMSO. The results obtained from TG-DSC analysis revealed that the metal complexes were thermally stable with point decomposition over 350 °C. The DFT/TDDFT calculations were carried out to provide the electronic structures and spectra of the compounds.

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Uçan, Selma Y. "Synthesis, spectral, thermal, and magnetic studies of cobalt(II), nickel(II), copper(II), zinc(II), and cadmium(II) complexes with N2O2 donor groups." Russian Journal of General Chemistry 84, no. 9 (2014): 1819–24. http://dx.doi.org/10.1134/s1070363214090308.

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Singh, Vinod P., and Shweta Singh. "Synthesis, physico-chemical, and spectral studies of dimeric cobalt(II), nickel(II), copper(II), zinc(II), and cadmium(II) complexes with dibutanone acyldihydrazones." Journal of Coordination Chemistry 64, no. 17 (2011): 3068–80. http://dx.doi.org/10.1080/00958972.2011.613461.

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Singh, Vinod P., K. B. Singh, and K. K. Narang. "Synthesis, Electronic and IR Spectral Studies of Some Polymeric Cobalt(II), Nickel(II), Zinc(II) and Cadmium(II) Azido Complexes with Hydrazine." Journal of Macromolecular Science, Part A 46, no. 1 (2008): 110–15. http://dx.doi.org/10.1080/10601320802514756.

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G., L. CHOUDHARY, R. PRASAD S., and RAHMAN A. "Synthesis, Magnetic and Spectral Studies of some Schiff Base Chelates of Iron-, Cobalt-, Nickel-, Zinc-, Cadmium- and Mercury(II)." Journal of Indian Chemical Society Vol. 74, Sep 1997 (1997): 683–85. https://doi.org/10.5281/zenodo.5895368.

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Research Laboratories. P. G. Department of Chemistry, Sahibganj College, Sahibganj-816 109 Manuscript received 27 April 1994, revised 6 May 1996, accepted 9 August 1996 The Schiff base ligands form complexes with divalent metal ions of different stoichiometries. The FeII, CoII and Nill complexes are six-coordinated with an octahedral or distorted octahedral geometry and the ZnII, Cdll and Hgll complexes are four-coordinated with a tetrahedral geometry around the metal ions. Metal chlorides are more toxic in comparison to their respective complexes and ligands.

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(MS.), NEELAM SAXENA, D. JUNEJA H., and N. MUNSHI K. "Synthetic, Spectral, Thermal and Powder X-ray Diffraction Studies on some Coordination Polymers of Zinc(II) and Cadmium(II)." Journal of Indian Chemical Society Vol. 70, Nov-Dec 1993 (1993): 943–49. https://doi.org/10.5281/zenodo.5947639.

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Department of Chemistry, Nagpur University, Nagpur-440 010 Manuscript received 31 August 1993 Three new his-ligands, viz. sebacyl-bis-hydroxamic acid (SHA), adipyl-bis-hydroxamic acid (AHA) and fumaryl-bishydroxamic acid (FHA) and their coordination polymers with ZnII and CdII have been prepared. These coordination polymers have been characterised by elemental analysis, thermal, infrared spectral and X-ray diffraction studies. These polymers have considerable thermal stability and are insoluble in almost all common organic solvents. Thermogravimetric curves have been analysed critically and discussed in detail. The use of Freeman-Carroll and Sharp-Wentworth methods have been made to evaluate activation energy and thermal stability of these polymers. The values of thermal activation energy calculated with the help of both these methods are in good agreement. Thermodynamic parameters such as free energy change, entropy change, apparent entropy change and the frequency factor have also been evaluated by using the data of Freeman-Carroll method. The decomposition pattern observed on the TGA curves, have been analysed and the conclusions drawn have been further confirmed by DTA studies. Powder X-ray diffraction studies have been undertaken to determine lattice parameters viz. crystal system, crystal lattice edge, volume and crystallite size.

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Singh, Virendra, Nidhi Pant, Rajat Kumar Sharma, et al. "Adsorption Studies of Pb(II) and Cd(II) Heavy Metal Ions from Aqueous Solutions Using a Magnetic Biochar Composite Material." Separations 10, no. 7 (2023): 389. http://dx.doi.org/10.3390/separations10070389.

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Heavy metal toxicity in water is a serious problem that may have harmful effects on human health and the ecosystem. Lead [Pb(II)] and cadmium [Cd(II)] are two such heavy metal ions, present in water, whose severity is well-known and well-studied. In the current research, magnetic biochar composite (MBC) is studied as an adsorbent material for the effective removal of lead and cadmium ions from water solutions. Magnetite (Fe3O4) nanoparticles and pine-needle-derived ultrasonicated magnetic biochar were used in different weight ratios to prepare APTES (3-aminopropyl triethoxysilane)-functionalized MBC (FMBC). An average crystalline size of ~10 nm for magnetite NPs was obtained via XRD analysis. The adsorption characteristics of both Pb(II) and Cd(II) ions were investigated in a batch experiment. The FTIR spectra of raw biochar, MBC, FMBC, and metal-loaded FMBC were obtained at different stages. The decrease in the intensity of the –NH2 functional group in the FTIR spectra of the residue confirmed the successful adsorption of heavy metal ions. The SEM-EDX spectra of the residue showed the uniform adsorption of Pb(II) and Cd(II) heavy metal ions onto the surface of the adsorbent. Magnetic biochar composite (MBC) was found to be a very effective adsorbent at basic pH, as a maximum of 97% instantaneous heavy metal removal was observed for both ions in synthetic water solutions. The Langmuir isotherm model predicted the monolayer adsorption and good affinity between the metal ions and adsorbent. The prepared MBC is low-cost, environmentally friendly, and it has shown good adsorption performance. Therefore, our study suggests that the magnetic biochar composite under study is an effective adsorbent for lead and cadmium metal ion removal from aqueous solutions at normal room temperature. Only a few hundred milligrams of the adsorbent dose is sufficient to remove higher concentrations (~100 ppm) of lead and cadmium at basic pH conditions of aqueous solutions.

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Al-Sabti, Matheel D., Ahmed A. H. Al-Amiery, Yasmien K. Al-Majedy, and Amel Ali. "Antimicrobial Studies of novel metal complexes of 3,5-dimethyl-1H-pyrazol-1-yl phenyl methanone and 1-benzoyl-3-methyl-1H-pyrazol-5(4H)-one." Journal of Biotechnology Research Center 3, no. 2 (2009): 1–12. http://dx.doi.org/10.24126/jobrc.2009.3.2.58.

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Chromium )III), cobalt (II), nickel (II), copper (II) and cadmium (II) complexes of 3,5-dimethyl-1H-pyrazol-1-yl phenyl methanone and 1-benzoyl-3-methyl-1H-pyrazol-5(4H)-one have been synthesized and characterized by elemental analysis, FT-IR, UV/visible spectra, and room temperature magnetic susceptibility. Cadmium complex is expected to have tetrahedral structure while the other complexes are expected to have octahedral structure. The free ligands and their metal complexes have been tested in vitro against a number of microorganisms (Staphylococcus aurous, E.coli, Proteus vulgaris, Pseudomonas, and Klebsiella) in order to assess their antimicrobial properties.

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Murugan, T., Rangaswamy Venkatesh, Kannappan Geetha, and Aly Abdou. "Synthesis, Spectral Investigation, DFT, Antibacterial, Antifungal and Molecular Docking Studies of Ni(II), Zn(II), Cd(II) Complexes of Tetradentate Schiff-Base Ligand." Asian Journal of Chemistry 35, no. 6 (2023): 1509–17. http://dx.doi.org/10.14233/ajchem.2023.27808.

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By refluxing 4-nitro-o-phenylenediamine and 5-nitro salicylaldehyde, a new Schiff base ligand was synthesized. By reacting the appropriate precursor with the tetradentate Schiff base ligand, three nitro-substituted nickel(II), zinc(II) and cadmium(II) complexes were synthesized. UV-Visible, FTIR and 1H NMR spectral investigations were used to characterize the ligand. Molar conductance, LC-MS, UV-visible and FTIR spectrum analysis were used to characterize the synthesized metal(II) complexes. The ligand and metal(II) complexes were also tested for antibacterial activity. DFT simulations were performed at the B3LYP/6-311G (d,p) and LanL2dz levels of theory were utilized to study the geometry of the Schiff base ligand and the metal(II) complexes. In addition, the molecular orbital occupancy of HOMO and LUMO, as well as the molecular electrostatic potential (MEP), were computed. Molecular docking investigation were conducted utilizing the active sites of the E. coli FabH-CoA complex (PDB ID: 1HNJ) receptor in order to detect the interactions between metal(II) complexes and define their likely binding locations.

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J., K. VERMA, and S. P. VERMA G. "Potentiometric and Structural Studies on Chromium(II), Manganese(II), lron(II), Cobalt(II), Nickel(II), Copper(II), Zinc(Il) and Cadmium(Il) Complexes with Butan-3- semicarbazone-1-carboxylic Acid." Journal of Indian Chemical Society Vol. 63, May 1996 (1986): 469–71. https://doi.org/10.5281/zenodo.6277453.

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Government College, Daman-396 210 Ranchi University, Ranchi-834 008 Manuscript received 28 August 1984, revised 24 February 1986, accepted 31 March 1986 The potentiometric studies on CrII,MnII,FeII,CoII,NiII,CuII,ZnII, and CdII chelates with butan-3-semicarbazone-1-carboxylic acid werecarried out according to Calvin-Bjerrum technique in 75% (viv) dioxane-water medium at 25, 35 and 45°(µ-0.1M NaCIO4). The stability constant suggests that high temperature favours the formation Of the chelates and follows the order CuII > ZnII >NiII >CoII>FeII >MnII>CrII>CdII The negative ∆G values suggest spontaniety of the reaction. The positive ∆S values indicate that the entropy term is favourable for the chelate ring formation. The solid chelates have been characterised on the basis of analytical, conductance, magnetic and electronic and infrared spectral data. The analytical data suggest 1 : 2 metal-ligand composition. The chelates are non-electrolytes and monomers. The infrared data reveal that the ligand behaves as a monobasic tridentate ligand which deprotonates during complexation and coordinates through azomethine nitrogen and carbonyl oxygen. The magnetic and electronic spectral data suggest a spin-free octahedral geometry around metal (II) ions.

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Halim, Abdul, Md Shahidur Rahman, Pradip K. Bakshi, and A. A. Shaikh. "Cu(II), Zn(II), and Cd(II) Complexes of L-Asparagine: Preparation, Characterization and Electrochemical Properties." Dhaka University Journal of Science 73, no. 1 (2025): 31–37. https://doi.org/10.3329/dujs.v73i1.81282.

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L-asparaginato complexes of Copper(II), Zinc(II) and Cadmium(II) were synthesized from their respective metal oxide and L-asparagine. These prepared complexes were characterized by their metal content analysis, infrared, and ultravioletvisible spectral studies, magnetic susceptibility measurement, thermal analysis, and cyclic voltammetric measurement. Physico-chemical investigations reveal that [M(OOCCHNH2CH2CONH2)2], (M = Cu(II), Zn(II), and Cd(II)) is the general formula for the complexes. L-asparagine combines with metal oxides to form bis(L-asparaginato)metal(II) complexes in which the metal(II) ion is hexa-coordinated by the O- anion of the carboxylate ion, the N atom of the amino group, and the O atom of the side chain carboxamide group from each of the two asparaginato species. The statement is corroborated by the analyses conducted for these complexes. The redox behaviours of the metal ion, both in its free state and when complexed, exhibit notable differences, as demonstrated by voltammetric investigations. Both peak currents and peak potentials respond sensitively to the complexation process, as it is expected. Dhaka Univ. J. Sci. 73(1): 31-37, 2025 (January)

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El-Gammal, Ola A., Gaber M. Abu El-Reash, and Mohammed M. El-Gamil. "Structural, spectral, pH-metric and biological studies on mercury (II), cadmium (II) and binuclear zinc (II) complexes of NS donor thiosemicarbazide ligand." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 123 (April 2014): 59–70. http://dx.doi.org/10.1016/j.saa.2013.12.034.

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35

Aksenova, Iuliia, Elena Bocharnikova, and Maria Ashmarina. "Photonics of Halogenated Zinc(II) and Cadmium(II) Dipyrromethene Complexes." Colorants 1, no. 3 (2022): 298–306. http://dx.doi.org/10.3390/colorants1030018.

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This article compares spectroscopic properties of the series of dipyrromethene dyes, namely their complexes of boron (III), zinc(II) and cadmium(II) with the halogenated ligands of the same structure. Absorption and emission spectra, lifetimes of long-lived emission and quantum yields of luminescence were studied as the functions of molecular structure of dipyrromethene complexes. The role of the position and nature of a substituent in a ligand, polarity of a solvent and temperature of media were also investigated. The studies demonstrate that replacing the central atom boron(III) by zinc(II) decreases the fluorescence quantum yield, indicating the increased role of non-radiative processes in excitation energy deactivations such as intersystem crossings. In addition, according to the heavy atom effect, the efficiency of intersystem crossings in halogen-substituted zinc(II) and cadmium(II) dipyrromethene complexes is higher than in the corresponding boron fluoride dipyrromethenes (BODIPY), which leads to increase in phosphorescence at low temperatures (frozen solutions). The obtained results make it possible to carry out further investigations of potential sensory properties that are required for systematic use of halogenated dipyrromethene complexes for the creation of modern optical oxygen sensors and singlet oxygen photosensitizers for photodynamic therapy or photocatalytic oxidative reactions.

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Saulawa, Aisha Ibrahim, Abdullahi Hussaini Dangani, and Saudat Muhammad. "SYNTHESIS, CHARACTERIZATION, AND ANTIBACTERIAL EVALUATION OF DIVALENT METAL COMPLEXES WITH SCHIFF BASES DERIVED FROM 4- ANISALDEHYDE AND ARGININE." FUDMA JOURNAL OF SCIENCES 8, no. 3 (2024): 71–74. http://dx.doi.org/10.33003/fjs-2024-0803-2475.

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In the present study, a new Schiff base, 5-Guanidino-2-[(4-methoxy-benzylidene)-amino]-pentanoic acid, and its metal (II) complexes were synthesized. Structural characterization was done using FTIR, UV-visible spectral analysis, molar conductance, and melting/decomposition temperature determination. Spectral studies revealed the ligand to be bidentate, coordinating with the metal through the carboxylic oxygen and azomethine nitrogen. The antibacterial activity (in vitro) against Escherichia coli and Staphylococcus aureus strains was studied using the agar well diffusion method. The results indicated that the free ligand exhibited no biological activity, whereas the cadmium complex (C28H38CdN8O6) proved to be the best antibacterial agent (up to 27 mm diameter inhibition zone against E. coli), followed by the Mn (II) complex and the Ni (III) complex having the least activity against both Escherichia coli and Staphylococcus aureus. This means that metal chelation significantly affected the anti-bacterial behavior of the organic Schiff base. This study contributes to the growing body of knowledge in the field of bioinorganic chemistry and may have potential implications for pharmaceutical and biomedical applications.

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Dhanya, V. S., M. R. Sudarsanakumar, S. Suma, et al. "Spectral, thermal, structural and microhardness studies of tetraaquabis(malonato)cadmium(II)copper(II): A new three-dimensional heterobimetallic framework system." Inorganica Chimica Acta 409 (January 2014): 367–71. http://dx.doi.org/10.1016/j.ica.2013.09.026.

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Krishnan, G., and C. P. Prabhakaran. "Mass spectral studies on some dithiocarbamato complexes of manganese(III), iron(III), cobalt(III) and cadmium(II)." Polyhedron 13, no. 6-7 (1994): 983–86. http://dx.doi.org/10.1016/s0277-5387(00)83019-3.

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Reena, T. A., E. B. Seena, and M. R. Prathapachandra Kurup. "Synthesis and spectral studies of cadmium(II) complexes derived from di-2-pyridyl ketone and N4-phenylsemicarbazide: First structural report of a cadmium(II) complex of semicarbazone." Polyhedron 27, no. 6 (2008): 1825–31. http://dx.doi.org/10.1016/j.poly.2008.02.020.

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Reddy, K. Hussain, and Y. Lingappa. "Spectral and thermal studies on mixed lignad complexes of zinc(II) and cadmium (II) with diethyldithiocarbamate and 2,2′-bipyridyl/1,10-phenanthroline." Proceedings / Indian Academy of Sciences 105, no. 2 (1993): 87–94. http://dx.doi.org/10.1007/bf02867142.

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KAKARLA, Ramana Kumar, Raghavendra Guru Prasad ALURU, Srilalitha VINNAKOTA, and RAO KRISHNA RAO, Ravindranath LAKSHMANA. "SYNTHESIS AND CHARACTERIZATION OF MALONIC ACID DIHYDRAZIDE AND ITS METAL COMPLEXES." Periódico Tchê Química 12, no. 24 (2013): 26–33. http://dx.doi.org/10.52571/ptq.v11.n20-21.2013.26_periodico20e21_pgs_26_33.pdf.

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A new series of complexes was synthesized by the reaction between malonyl dihydrazide (MAH) and manganese, copper, nickel, zinc, cadmium, cobalt and ferric salts in methanolic medium. The complexes were characterized by elemental analysis, molar conductance measurements, electronic, IR and 1H NMR spectral studies. Based on the results obtained, the stoichiometry of Fe(III)-MAH and Co(III)-MAH was proposed to be 1:3 and that for Cu(II)-MAH, Cd(II)-MAH, Zn(II)-MAH, Mn(II)-MAH, Ni(II)-MAH was proposed to be 1:2 (M:L). It was suggested that the nitrogen present in the azomethine (>C=N-) group of the enolic form present in the ligand was involved in the formation of complexes. A clear picturisation indicating the bonding sites were depicted for each complex. The metal complexes exhibit different geometries such as tetrahedral, square planar and octahedral arrangements.

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Odabaşıoğlu, Sinem, Raif Kurtaran, Akin Azizoglu, Hülya Kara, Sevi Öz, and Orhan Atakol. "Experimental and computational investigations of a cadmium(II) mononuclear complex with 2,6-Bis(3,5-dimethyl-N-pyrazolyl)pyridine (bdmpp) and selenocyanate as ligands." Open Chemistry 7, no. 3 (2009): 402–9. http://dx.doi.org/10.2478/s11532-009-0027-x.

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AbstractA new cadmium (II) complex, [Cd(bdmpp)(SeCN)2(H2O)] (1) (where bdmpp = 2,6-bis(3,5-dimethyl-N-pyrazolyl)pyridine), has been synthesized and characterized by elemental and spectral (IR, 1H-NMR and 13C-NMR, UV-Vis) analyses, differential scanning calorimetry, and single crystal X-ray diffraction studies. X-ray analysis showed that the structure was crystallized in the monoclinic space group Cc with a = 9.031(2), b = 13.884(3), c = 16.910(3) Å, and Z = 4. The geometry around the cadmium atom is distorted octahedral with a CdN3Se2O setup. The N atoms of the SeCN are engaged in two strong intermolecular H-bonding interactions forming a 3D supramolecular polymeric network. The geometry and vibrational frequencies of complex 1 computed with the DFT methods (BLYP, B3LYP, B3PW91, MPW1PW91) are in better agreement with experiment than those obtained with the ab-initio method except for the bond angles. The molecular orbital diagram has been also calculated and visualized at the B3LYP/LanL2DZ level of theory.

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Sharma, Preeti, and Vedula Uma. "Schiff Base Anchored with Silver Nanoparticles as Effective Adsorbent for Removal of Cadmium(II) Heavy Metal from Industrial Wastewater." Asian Journal of Chemistry 32, no. 8 (2020): 1941–46. http://dx.doi.org/10.14233/ajchem.2020.22694.

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The current study deals with the examination of the capacity of Schiff base anchored with silver nanoparticles for removal of cadmium(II) ions from industrial wastewater. Schiff base was synthesized using refluxing of salicylaldehyde and 4-aminoantipyrine in alcoholic medium. The characterization of Schiff base were studied by elemental analysis, FTIR, NMR, UV-visible and mass spectral studies. The silver nanoparticles were synthesized using the chemical reduction method and characterized. Then, silver nanoparticles anchored to the Schiff base by suitable method and again characterized. Peanut shells were used as solid phase for removal of Cd(II) ions. The effects of several parameters to optimize the adsorption of Cd(II) ions on solid phase, including pH, contact time, initial metal ion concentration and adsorbent weight were investigated. The maximum removal efficiency of Cd(II) ions on solid phase using Ag nano@Schiff base was achieved under experimental conditions of pH 6 (% removal = 81%), contact time of 15 min (% removal = 93%), initial metal ion concentration of 0.5 ppm (% removal = 95%) and adsorbent weight of 3 mg (% removal = 89%). The results showed that extraction of Cd2+ on AgNPs@Schiff base follows Freundlich adsorption isotherm.

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Kennedy, Michael A., Garry W. Buchko, and Nancy J. Hess. "Human nucleotide excision repair protein xpa: summary of exafs studies on the zn (ii), co (ii) and cd (ii) associated minimal dna-binding domain." Protein & Peptide Letters 7, no. 1 (2000): 49–56. http://dx.doi.org/10.2174/092986650701221205155907.

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Abstract: The zinc in the metal-binding core of the DNA-binding domain of the nucleotide excision repair protein XPA (M98-F219) can be replaced with cadmium (II) and cobalt (II). Here, we summarize extended X ray fine structure spectra collected on each protein in the lyophilized state and in 15% frozen aqueous glycerol solution. Under both conditions the Zn2•, Cd2+,and Co2• are tetrahedrally coordinated to the sulfur atom of four cysteine residues with the Zn-S and Co-S bond lengths nearly identical, at 2.34 A, and the Cd-S bond length at 2.54A.

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Lamine, Salim, George Petropoulos, Paul Brewer, et al. "Heavy Metal Soil Contamination Detection Using Combined Geochemistry and Field Spectroradiometry in the United Kingdom." Sensors 19, no. 4 (2019): 762. http://dx.doi.org/10.3390/s19040762.

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Technological advances in hyperspectral remote sensing have been widely applied in heavy metal soil contamination studies, as they are able to provide assessments in a rapid and cost-effective way. The present work investigates the potential role of combining field and laboratory spectroradiometry with geochemical data of lead (Pb), zinc (Zn), copper (Cu) and cadmium (Cd) in quantifying and modelling heavy metal soil contamination (HMSC) for a floodplain site located in Wales, United Kingdom. The study objectives were to: (i) collect field- and lab-based spectra from contaminated soils by using ASD FieldSpec® 3, where the spectrum varies between 350 and 2500 nm; (ii) build field- and lab-based spectral libraries; (iii) conduct geochemical analyses of Pb, Zn, Cu and Cd using atomic absorption spectrometer; (iv) identify the specific spectral regions associated to the modelling of HMSC; and (v) develop and validate heavy metal prediction models (HMPM) for the aforementioned contaminants, by considering their spectral features and concentrations in the soil. Herein, the field- and lab-based spectral features derived from 85 soil samples were used successfully to develop two spectral libraries, which along with the concentrations of Pb, Zn, Cu and Cd were combined to build eight HMPMs using stepwise multiple linear regression. The results showed, for the first time, the feasibility to predict HMSC in a highly contaminated floodplain site by combining soil geochemistry analyses and field spectroradiometry. The generated models help for mapping heavy metal concentrations over a huge area by using space-borne hyperspectral sensors. The results further demonstrated the feasibility of combining geochemistry analyses with filed spectroradiometric data to generate models that can predict heavy metal concentrations.

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A., S. ASWAR, and G. BHADANGE S. "Structural and Conducting Studies on Manganese-, Cobalt-, Nickel-, Copper-, Zinc- and Cadmium(II) Polychelates." Journal of Indian Chemical Society Vol. 74, Sep 1997 (1997): 679–82. https://doi.org/10.5281/zenodo.5895350.

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Department of Chemistry, Amravati University, Amravati-444 602 Manuscript received 4 December 1995, revised 15 July 1996, accepted 3 September 1996 Chelates of MnII, CoII, Nill, Cull, Znll and Cdll have been prepared from bis(mercaptoacetamide)-p-phenylenediamine [BMAPD]. All the chelates are coloured amporphous solids and highly insoluble in water and common organic solvents. Thermogravimetric analysis has been carried out. Kinetic and thermodynamic parameters have also been evaluated by using thermal decomposition pattern. D.C. electrical conductivity study has also been carried out.

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Abbas, Bayader F., Zeyad S. Abdulla, and Mahmoud N. Abid Al-jibouri. "Preparation and Spectroscopic Studies of Some Metal complexes with Azo ligand derived from 2-aminobenzothiazole and 4-Hydroxycoumarin." Research Journal of Chemistry and Environment 26, no. 10 (2022): 164–71. http://dx.doi.org/10.25303/2610rjce1640171.

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The present study describes the synthesis and characterization of some transition meal complexes derived from azo ligand derived from condensation 4-hydroxycoumarine and 2-aminobenzothiazole. The azo ligand was characterized by C.H.N.S elemental analyses, GC-Mass spectroscopy, H NMR and FT-IR spectra. The metal complexes with the new azo dye were isolated by the direct reactions of the metal chlorides of cadmium(II), zinc(II), cobalt(II), nickel(II) and copper(II) ions with the alkaline solution of free ligand to afford the following complex [ML(H2O)2Cl] where M=Co(II), Cd(II), Cu(II) and Zn(II). The results obtained from FAAS, elemental analyses, UV-visible spectra, LC-MS and magnetic susceptibility measurements confirmed the tetrahedral environment for [CdLCl] complex and octahedral environment around copper(II), cobalt(II) and nickel(II) complexes. The time and mole ratios factors were studied to recommend the optimized conditions of metal complexes formations and the observed data was investigated for the deprotonation of the azo-dye at pH 6-7.0 with 6.5 minutes as time of reaction to afford the crystalline complexes.

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Mohana Priyadarshini, K., A. Chandramohan, G. Anandha Babu, and P. Ramasamy. "Synthesis, crystal growth, spectral, optical, thermal and dielectric studies of dichloro(4-hydroxy-l-proline)cadmium(II) single crystals." Optik 125, no. 3 (2014): 1390–95. http://dx.doi.org/10.1016/j.ijleo.2013.08.008.

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Arivarasan, Ayyaswamy, Sasikala Ganapathy, and Ramasamy Jayavel. "Fabrication of Highly Fluorescent Cadmium Based Aqueous Phase Colloidal Quantum Dots for Solar Cell Applications." Advanced Materials Research 584 (October 2012): 313–18. http://dx.doi.org/10.4028/www.scientific.net/amr.584.313.

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Highly fluorescent Cadmium based II-VI CQD’s plays a vital role in third generation photovoltaic’s design. In this paper, a novel approach for rapid synthesis of two different high quality cadmium based CQD’s in aqueous phase was presented and the optical stability and the structural properties of those materials were studied out. In this work Tellurium composed CQD’s along with cadmium were prepared by colloidal route. In the above procedure Thio Glycolic Acid (TGA) as well as Mercapto succinic acids (MSA) was used as the capping agents. All these procedures were carried out in aqueous medium at air atmosphere. The size dependent band gaps of the prepared quantum dots were determined from UV-Vis spectra and compared with the other one. The fluorescent properties of CdTe CQDs were investigated by using fluorescence spectra. The surface and structural morphologies were determined by using HRSEM and X-ray diffraction studies. The formation of CdTe quantum dots and the capping effect of the thiol group were investigated from EDAX and FTIR analysis.

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Konar, Saugata, Atanu Jana, Kinsuk Das, et al. "A rare pentanuclear cadmium(II) complex and two new mononuclear zinc(II) complexes of pyrazole derived ditopic ligands – Synthesis, crystal structures and spectral studies." Inorganica Chimica Acta 397 (March 2013): 144–51. http://dx.doi.org/10.1016/j.ica.2012.12.003.

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Journal articles on the topic 'Spectral Studies of Cadmium(II)'

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