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Journal articles on the topic 'Polymeric metal complexes'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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1

Fatih, Mehmet EMEN, and Esra DEMİRDÖĞEN Ruken. "SYNTHESIS OF PYRIDINE DERIVATIVE POLYMERIC COPPER COMPLEX WITH METAL-AZID BONDS." Journal of Natural Science and Technologies 1, no. 1 (2022): 143–50. https://doi.org/10.5281/zenodo.7384181.

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In this study, pyridine-derived polymeric copper (II) complexes containing metal azide bonds were prepared. The characterization of the complexes given with the general formula, [Cu(L)<sub>2</sub>(N<sub>3</sub>)<sub>2</sub>Cl<sub>2</sub>]n (L1: 3,5-dimethyl pyridine, L2: 3,4-dimethyl pyridine, L3: 2-amino-3-methyl pyridine, L4: 2,6-diamino pyridine) was performed by FT-IR, AAS and magnetic susceptibility analyzes. The intense peak observed at 2045-2167 cm-1 in the spectra corresponds to the asymmetric azide vibrations, υas(N<sub>3</sub><sup>-</sup>), which indicates that polymeric copper complexes are formed over azide bonds. Cu2+ amounts in the complexes were found in the range of 26.25%-33.61% from the AAS results. The thermal properties of polymeric copper complexes were investigated with the TG/DTA combined system. Unpaired electron numbers for copper complexes were found in the range of 0.89-1.45. Copper complexes are paramagnetic, and the number of unpaired electrons being different from the expected (n=1) value indicates that the geometry of the complex is distorted.

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2

Ashurov, N. Sh, S. M. Yugai, A. A. Atakhanov, N. R. Vakhidova, and S. Sh Rashidova. "Study of the magnetic properties of nanostructural metal complexes of chitosan." Journal of Physics: Conference Series 2388, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1742-6596/2388/1/012007.

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Abstract Nanostructured polymeric metal complexes based on chitosan with Co2+, Mn2+, Cu2+ have been obtained. The role of the precipitant in the formation of nanoparticles with certain sizes is shown. Optimal morphologies for the creation of new and promising nanostructured metal-polymer materials with magnetic properties have been identified. A correlation has been established between the magnetic characteristics of polymeric metal complexes based on chitosan with metal ions of the 3-d transition series with their structural features.

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3

Berger, Ulrich, and Joachim Strähle. "Peierls Distortion in Polymeric Metal Complexes With Metal-Metal Chains." Molecular Crystals and Liquid Crystals 120, no. 1 (1985): 389–92. http://dx.doi.org/10.1080/00268948508075826.

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4

Xiao, Dong-Rong, En-Bo Wang, Hai-Yan An, et al. "Rationally Designed, Polymeric, Extended Metal-Ciprofloxacin Complexes." Chemistry - A European Journal 11, no. 22 (2005): 6673–86. http://dx.doi.org/10.1002/chem.200500548.

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5

A, K. BANERJEE, KUMAR GHOSH MOHIT, and K. ROY S. "Metal Complexes as Ligands : Polynuclear Alkali Metal Complexes with Nickel(II) Chelates." Journal of Indian Chemical Society Vol. 71, June-Aug 1994 (1994): 435–39. https://doi.org/10.5281/zenodo.5895637.

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Chemistry Department, Patna University, Patna-800 005 <em>Manusript received 18 November 1993</em> Some nickel(II) complexes with O-N donor ligands (salicylaldoxime, glycine and β-alanine) and having oxygen-bridges with polymeric structures, depolymerise under suitable conditions and break up into monomers. These monomers in situ, behave as a single and double faced bidentate oxygen donor Lewis bases, and combine with partially covalent bonded alkali metal cations, to form oxygen-bridged polynuclear complexes. The spectral and magnetic moment studies indicate that the polymerised nickel(n) ions are converted into tetrahedral ones in their alkali metal adducts. Nickel(II)-salicylaldoximate forms oxygen-donor live-membered stable chelate ring with alkali metal ions.

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6

Safiullina, Ilnara I., Elbeiy R. Babaev, Rauliya R. Syrlybaeva, and Nazrin Ch Movsum-zade. "NITRILE COMPLEXES AS EFFECTIVE ANTIMICROBIAL ADDITIVES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 5 (2018): 81. http://dx.doi.org/10.6060/tcct.20165905.5341.

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Antimicrobial properties of nitrile complexes of transition metal salts were studied including the investigation of their activity in surfactants and mineral oil environments. Experiments of the polymeric complexes preparation by in-situ copolymerization of the nitrile polymers in the presence of transition metal salts and reactions of transition metal salts added to the ready polymers were performed. The dependence of the polymer complexes forming particularities on central metal atoms nature was determined.

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7

Sacarescu, Liviu, Rodinel Ardeleanu, Gabriela Sacarescu, and Mihaela Simionescu. "Synthesis and Characterization of Polysilane-Organometallic Complexes." High Performance Polymers 19, no. 5-6 (2007): 510–19. http://dx.doi.org/10.1177/0954008306081192.

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A new polysilane with pendant metal complex segments was synthesized and characterized. For this purpose a macroligand has been prepared starting from a iodopropyl-functionalized polysilane and a bis(salicylideneimine) derivative. Under mild reaction temperature this polymeric ligand was able to form crosslinked structures. The material was then doped with metal cations and was investigated to observe the system behavior near the gelation point. The UV-vis spectrum of the new material indicated that the electronic structures of the conjugate polysilane chain and metal complex remained unaffected by the condensation reaction process. Similar polymeric structures could be useful to build new organic electroconductive devices.

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8

Malik, Ashraf, Shadma Parveen, Tansir Ahamad, Saad M. Alshehri, Prabal Kumar Singh, and Nahid Nishat. "Coordination Polymer: Synthesis, Spectral Characterization and Thermal Behaviour of Starch-Urea Based Biodegradable Polymer and Its Polymer Metal Complexes." Bioinorganic Chemistry and Applications 2010 (2010): 1–8. http://dx.doi.org/10.1155/2010/848130.

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A starch-urea-based biodegradable coordination polymer modified by transition metal Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) was prepared by polycondensation of starch and urea. All the synthesized polymeric compounds were characterized by Fourier transform-infrared spectroscopy (FT-IR),H-NMRspectroscopy,C-NMRspectroscopy, UV-visible spectra, magnetic moment measurements, differential scanning calorimeter (DSC), and thermogravimetric analysis (TGA). The results of electronic spectra and magnetic moment measurements indicate that Mn(II), Co(II), and Ni(II) complexes show octahedral geometry, while Cu(II) and Zn(II) complexes show square planar and tetrahedral geometry, respectively. The thermogravimetric analysis revealed that all the polymeric metal complexes are more thermally stable than the parental ligand. In addition, biodegradable studies of all the polymeric compounds were also carried out through ASTM standards of biodegradable polymers byCO2evolution method.

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9

Schreiber, A., H. Rauter, M. Krumm, S. Menzer, E. C. Hillgeris, and B. Lippert. "Multinuclear Metal Nucleobase Complexes." Metal-Based Drugs 1, no. 2-3 (1994): 241–46. http://dx.doi.org/10.1155/mbd.1994.241.

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Of all properties of metal nucleobase complexes, formation of multinuclear species appears to be an outstanding feature. After a brief introduction into well known polymeric metal nucleobase complexes, three aspects recently Studied in our laboratory will be dealt with in more detail: (i) Heteronuclear complexes derived from trans-[(amine)2Pt(1-MeC)2]2+ (1-MeC=1-methylcytosine). They form, e. g. with Pd(II) or Hg(II), upon single deprotonation of the exocyclic amino group of each 1-MeC ligand, compounds of type trans-[(amine)2Pt(1-MeC-)2MY]n+, displaying Pt-M bond formation. (ii) Cyclic nucleobase complexes derived from cis-a2Pt(II). A cyclic compound of composition {[(en)Pt(UH-N1,N3)]4}4+ (UH=monoanion of unsubstituted uracil) is presented and the analogy with organic calix-[4]-arenes is pointed out. (iii) Cyclic nucleobase complexes from trans-a2Pt(II). Possible ways for the preparation of macrocyclic nucleobase complexes containing trans-a2Pt(II) linkages are outlined and precursors and intermediates are presented.

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10

V., PANDIT RAO, and D. DAVE L. "Polymeric Complexes of 2-Mercaptocarboxylic Acids with Nickel(II)." Journal of Indian Chemical Society Vol. 68, Dec 1991 (1991): 664–66. https://doi.org/10.5281/zenodo.6134656.

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University Department of Chemistry, Bhavnagar University, Bhavnagar-364 002 <em>Manuscript received 23 August 1989, revised 4 October 1991, accepted 6 December 1991</em> The complexes of 2-mercaptopropionic acid with different metal ions have been studied extensively<sup>1</sup>. Study on other similar type of 2-mercaptocarboxylic acids with different transition metal ions has not been carried out. The complexes of SH containing ligands have a great interest because of the controversy on the nature of complexation of SH group with metal. The present paper describes the preparation and characterisation of Ni<sup>ll</sup> polymeric complexes with 2-mercaptocarboxylic acids and their pyridine derivatives. The acids are, 2-mercaptovaleric (HMV), 2-mercaptocaproic (HMC), 2-mercaptoheptanoic (HMH) and 2-mercaptooctonoic (HMO) acids.

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11

Kaliyappan, T., S. Rajagopan, and P. Kannan. "New polymeric Schiff base and its metal complexes." Journal of Applied Polymer Science 91, no. 1 (2003): 494–500. http://dx.doi.org/10.1002/app.13138.

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12

Dickerson, Matthew, Brock Howerton, Younsoo Bae, and Edith C. Glazer. "Light-sensitive ruthenium complex-loaded cross-linked polymeric nanoassemblies for the treatment of cancer." Journal of Materials Chemistry B 4, no. 3 (2016): 394–408. http://dx.doi.org/10.1039/c5tb01613d.

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Cross-linked polymeric nanoassemblies are potential carrier systems for cytotoxic ruthenium complexes, and exhibit a combination of electrostatic and hydrophobic interactions with the metal complexes that impact release rates, release percentages, and biological activity.

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13

EL-Ghoul, Yassine, Maged S. Al-Fakeh, and Nora S. Al-Subaie. "Synthesis and Characterization of a New Alginate/Carrageenan Crosslinked Biopolymer and Study of the Antibacterial, Antioxidant, and Anticancer Performance of Its Mn(II), Fe(III), Ni(II), and Cu(II) Polymeric Complexes." Polymers 15, no. 11 (2023): 2511. http://dx.doi.org/10.3390/polym15112511.

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Natural polysaccharides are essential to a wide range of fields, including medicine, food, and cosmetics, for their various physiochemical and biological properties. However, they still have adverse effects limiting their further applications. Consequently, possible structural modifications should be carried out on the polysaccharides for their valorization. Recently, polysaccharides complexed with metal ions have been reported to enhance their bioactivities. In this paper, we synthesized a new crosslinked biopolymer based on sodium alginate (AG) and carrageenan (CAR) polysaccharides. The biopolymer was then exploited to form complexes with different metal salts including MnCl2·4H2O, FeCl3·6H2O, NiCl2·6H2O, and CuCl2·2H2O. The four polymeric complexes were characterized by Fourier-transform infrared spectroscopy (FT-IR), elemental analysis, ultraviolet–visible spectroscopy (UV–Vis), magnetic susceptibility, molar conductivity methods, and thermogravimetric analysis. The X-ray crystal structure of the Mn(II) complex is tetrahedral and belongs to the monoclinic crystal system with the space group P121/n1. The Fe(III) complex is octahedral and crystal data fit with the cubic crystal system with the space group Pm-3m. The Ni(II) complex is tetrahedral and crystal data correspond to the cubic crystal arrangement with the space group Pm-3m. The data estimated for the Cu(II) polymeric complex revealed that it is tetrahedral and belongs to the cubic system with the space group Fm-3m. The antibacterial study showed significant activity of all the complexes against both Gram-positive bacteria (Staphylococcus aureus and Micrococcus luteus) and Gram-negative (Escherichia coli and Salmonella typhimurium) pathogenic strains. Similarly, the various complexes revealed an antifungal activity against Candida albicans. The Cu(II) polymeric complex recorded a higher antimicrobial activity with an inhibitory zone reaching 4.5 cm against Staphylococcus aureus bacteria and the best antifungal effect of 4 cm. Furthermore, higher antioxidant values of the four complexes were obtained with DPPH scavenging activity varying from 73 to 94%. The two more biologically effective complexes were then selected for the viability cell assessments and in vitro anticancer assays. The polymeric complexes revealed excellent cytocompatibility with normal human breast epithelial cells (MCF10A) and a high anticancer potential with human breast cancer cells (MCF-7) which increase significantly in a dose-dependent manner.

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14

Mydhili, S. P., Ramana Reddy Ch Venkata, B. Sireesha, and S. Sreekanth. "Synthesis, Spectroscopic, Antibacterial, Antioxidant, DNA Binding and Cleavage, Molecular Docking Studies of Ni(II) and Cu(II) Complexes of S and N Donor Schiff Base Ligands." Research Journal of Chemistry and Environment 25, no. 11 (2021): 143–52. http://dx.doi.org/10.25303/2511rjce143152.

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Binary metal complexes of the ligands (L), H3FPT and H3FP4MT with Ni(II) and Cu(II) metal ions (M) were synthesized and characterized by different spectral and analytical techniques. Among these complexes, Ni(II)- H3FPT complex was found to be polymeric. The ligands and their complexes inhibited the growth of gram positive and gram negative bacterial strains to a moderate extent. The antioxidant nature of ligands and complexes was also established. Intercalative mode of binding of the complexes with calf thymus (CT) DNA was proposed from electronic absorption titrations, fluorescence quenching studies and viscosity measurements. The complexes showed hydrolytic cleavage of plasmid pBR322. Docking studies of metal complexes with DNA revealed that the complexes of H3FP4MT are more active than H3FPT.

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15

Patel, Yogesh S. "Studies on Oligomer Metal Complexes Derived from Bisamic Acid of Pyromellitic Dianhydride and 4-Bromoaniline." International Scholarly Research Notices 2014 (October 30, 2014): 1–7. http://dx.doi.org/10.1155/2014/516274.

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Novel oligomer metal complexes (2a–f) of the ligand 2,5-bis((4-bromophenyl)carbamoyl) terephthalic acid (1) were prepared using transition metal salts and characterized by various spectroscopic techniques. The geometry of oligomer metal complexes was carried out by electronic spectral analysis and magnetic measurement studies. Polymeric properties have also been carried out. Ligand was synthesized using pyromellitic dianhydride and 4-bromoaniline. It was duly characterized. All novel synthesized compounds 1 and 2a–f were evaluated for their antibacterial and antifungal activity. The results showed significantly higher antibacterial and antifungal activity of oligomer metal complexes compared to the ligand.

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16

Eskandari, Arvin, Janine N. Boodram, Paul B. Cressey, et al. "The breast cancer stem cell potency of copper(ii) complexes bearing nonsteroidal anti-inflammatory drugs and their encapsulation using polymeric nanoparticles." Dalton Transactions 45, no. 44 (2016): 17867–73. http://dx.doi.org/10.1039/c6dt03811e.

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17

Pierpont, Cortlandt G., and Attia S. Attia. "Spin Coupling Interactions in Transition Metal Complexes Containing Radical o-Semiquinone Ligands. A Review." Collection of Czechoslovak Chemical Communications 66, no. 1 (2001): 33–51. http://dx.doi.org/10.1135/cccc20010033.

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Transition metal complexes ofo-semiquinone (SQ) ligands have been studied extensively over the past 25 years. A particularly interesting aspect of this coordination chemistry concerns magnetic interactions between paramagnetic metal ions and the radical anionic ligands. In this review we begin with a survey of relatively simple complexes consisting of a paramagnetic metal ion chelated by a single SQ ligand. Recent studies have revealed the importance of SQ-SQ coupling through diamagnetic metals, and complexes of this class are described in the second section of the review. Both interactions combine to account for the often complicated magnetic properties of complexes containing multiple SQ ligands chelated to a paramagnetic metal ion. Research on these complexes is surveyed in the third section with a concluding look toward polymeric SQ complexes. A review with 51 references.

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18

A., Ray, and N. Gupta S. "Construction of metal template polymer with covalently bound dithizone." Journal of Indian Chemistry Society Vol. 78, October-December 2001 (2001): 663–65. https://doi.org/10.5281/zenodo.5897342.

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Department of Polymer Science and Technology, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata-700 009, India <em>E-mail</em> : sngupta@cubmb.ernet.in  <em>Fax</em> : 91-33-3519755 <em>Manuscript received 10 April 2001</em> Dithizone complexes of Co<sup>11 </sup>, Zn<sup>11</sup> , Ni<sup>11</sup> and Cu<sup>11</sup> have been attached to a copolymer of styrene and acrylic acid which are then crosslinked. The metal ions are leached out leaving the ligand attached to the polymeric matrix. Absorption capacity of various metal ions in these polymeric ligands have been measured to evaluate the extent of template effect generated.

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19

Hedtmann-rein, Carola, Uwe Keppeler, Xaver Münz, and Michael Hanack. "Doped and Nondoped Polymeric Bridged Macrocyclic Transition Metal Complexes." Molecular Crystals and Liquid Crystals 118, no. 1 (1985): 361–64. http://dx.doi.org/10.1080/00268948508076241.

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20

Jeong, Hyein, Young-Soo Kwon, Burm-Jong Lee, and Chang-Sik Ha. "Polymeric Langmuir-Blodgett Films of Imidazole-Coordinated Metal Complexes." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 295, no. 1 (1997): 145–48. http://dx.doi.org/10.1080/10587259708042817.

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21

IYODA, Tomokazu, and Michio MATSUSHITA. "Polymeric Metal Complexes through Self-Assembly. Structures and Functions." Kobunshi 47, no. 5 (1998): 331–35. http://dx.doi.org/10.1295/kobunshi.47.331.

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22

Xie, J. "Novel polymeric metal complexes based on bis-(8-hydroxylquinolinol)." Dyes and Pigments 59, no. 2 (2003): 153–62. http://dx.doi.org/10.1016/s0143-7208(03)00106-2.

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23

Jeong, H., B. J. Lee, W. J. Cho, and C. S. Ha. "Polymeric Langmuir–Blodgett films containing imidazole-coordinated metal complexes." Polymer 41, no. 14 (2000): 5525–29. http://dx.doi.org/10.1016/s0032-3861(99)00831-9.

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24

Wang, Yongli, Wenzhen Guo, Dongling Liu, Ying Yang, and Wenjun Zheng. "1,2,4-Diazaphospholide complexes of yttrium(iii), dysprosium(iii), erbium(iii), and europium(ii,iii): synthesis, X-ray structural characterization, and EPR analysis." Dalton Transactions 45, no. 3 (2016): 899–903. http://dx.doi.org/10.1039/c5dt04285b.

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Heteroleptic, charge-separated heterobimetallic, and polymeric alkali metal ate complexes of 1,2,4-diazaphospholide yttrium(iii), dysprosium(iii), erbium(iii), europium(iii) and europium(ii) were prepared.

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25

WÖHRLE, D., O. N. SUVOROVA, N. TROMBACH, et al. "Synthesis of polymeric and low molecular weight phthalocyanines from nitriles and metal carbonyls on SiO2 and TiO2 and catalytic activities in the sulfide oxidation." Journal of Porphyrins and Phthalocyanines 05, no. 04 (2001): 381–89. http://dx.doi.org/10.1002/jpp.334.

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A new method for coatings of polymeric phthalocyanines and for comparison also of low molecular weight phthalocyanine metal complexes ( W , Cr , Mo , Co ) on quartz and titanium dioxide was developed by the reaction of metal carbonyls adsorbed on the carriers with tetracarbonitriles or phthalonitrile. By UV-vis or IR spectra the formation of structural uniform polymeric phthalocyanines on the carriers is established. The compounds are used then to compare their catalytic and photocatalytic activities in the oxidation of sulfide as test reaction.

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26

Constable, Edwin C., and Catherine E. Housecroft. "‘Simple’ Oligopyridine Complexes – Sources of Unexpected Structural Diversity." Australian Journal of Chemistry 73, no. 6 (2020): 390. http://dx.doi.org/10.1071/ch19621.

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The simple formulae often presented for main-group metal complexes of oligopyridines (typically 2,2′-bipyridine, 1,10-phenanthroline, and 2,2′:6′,2″-terpyridine) hide a wide variety of polymeric solid-state structures. We present an overview of these structures and reveal a plethora of 1D chains, including ladder assemblies, and 2D networks. In most assemblies, the polymeric backbone or network is defined by the metal atoms and bridging ligands other than oligopyridines. The heterocyclic ligands typically feature as peripheral decorations, often engaging in face-to-face supramolecular π-stacking interactions which define the assembly of the crystal. In 1D coordination polymers, three types of decoration predominate which we have defined as Type 1 (all the oligopyridines on the same side and π-stacked), Type 2 (alternating arrangement of oligopyridines), and Type 3 (a pairwise alternating structure).

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27

A., K. BANERJEE, SATYA PRAKASH SHEO, and K. ROY S. "Metal Complexes as Ligands. Polynuclear Alkali Metal Complexes with Diaquomonooxalato-nickel(ll) and -cobalt(ll)." Journal of Indian Chemical Society Vol. 62, Nov 1985 (1985): 818–20. https://doi.org/10.5281/zenodo.6324806.

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Chemistry Department, Patna University, Patna-800 005 Polymeric octahedral, diaquomonooxalato-nickel(II) and -cobalt(II) (Ni/Co(ox). 2H<sub>2</sub>O] have been used as 'metal complex ligands' in the synthesis of oxygen-bridged binuclear alkali metal complexes of the general formula [(M<sub>b</sub>L).M<sub>a</sub>ox.2H<sub>2</sub>O], <em>where </em>M<sub>b</sub> =Li, Na and K ; L=deprotonated organic acids ; M<sub>a</sub>= Ni or Co ; and ox=oxalate. In these binuclear alkali metal transition metal oxalates, the C=O frequencies have been observed only below 1 650 cm<sup>-1</sup> suggesting that all the oxalato groups present in the Ni/Co adducts are not normal/terminal ones ; most likely they are bridged ones. The electronic spectral and magnetic moment studies indicate that the polymerised octahedral Ni<sup>II</sup> and Co<sup>II</sup> ions are converted into tetrahedral ones in their alkali metal adducts.

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Andrikopoulos, Konstantinos, Charalampos Anastasopoulos, Joannis K. Kallitsis, and Aikaterini K. Andreopoulou. "Bis-Tridendate Ir(III) Polymer-Metallocomplexes: Hybrid, Main-Chain Polymer Phosphors for Orange–Red Light Emission." Polymers 12, no. 12 (2020): 2976. http://dx.doi.org/10.3390/polym12122976.

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In this work, hybrid polymeric bis-tridentate iridium(III) complexes bearing derivatives of terpyridine (tpy) and 2,6-di(phenyl) pyridine as ligands were successfully synthesized and evaluated as red-light emitters. At first, the synthesis of small molecular bis-tridendate Ir(III) complexes bearing alkoxy-, methyl-, or hydroxy-functionalized terpyridines and a dihydroxyphenyl-pyridine moiety was accomplished. Molecular complexes bearing two polymerizable end-hydroxyl groups and methyl- or alkoxy-decorated terpyridines were copolymerized with difluorodiphenyl-sulphone under high temperature polyetherification conditions. Alternatively, the post-polymerization complexation of the terpyridine-iridium(III) monocomplexes onto the biphenyl-pyridine main chain homopolymer was explored. Both cases afforded solution-processable metallocomplex-polymers possessing the advantages of phosphorescent emitters in addition to high molecular weights and excellent film-forming ability via solution casting. The structural, optical, and electrochemical properties of the monomeric and polymeric heteroleptic iridium complexes were thoroughly investigated. The polymeric metallocomplexes were found to emit in the orange–red region (550–600 nm) with appropriate HOMO and LUMO levels to be used in conjunction with blue-emitting hosts. By varying the metal loading on the polymeric backbone, the emitter’s specific emission maxima could be successfully tuned.

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29

A., C. HIREMATH, B. HALLI M., and V. HUGGI N. "Complexes of 3,4-Dihydro-4-oxobenzofuro[3,2-d]pyrimidine with some Bivalent Metal Ions." Journal of Indian Chemical Society Vol. 62, Sep 1985 (1985): 642–44. https://doi.org/10.5281/zenodo.6321948.

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Department of Chemistry, Gulbarga University, Gulbarga-585 106 <em>Manuscript received 25 October 1983, revised 16 </em>April <em>1984, accepted 11 September 1985</em> Complexes of Co<sup>II</sup>, Ni<sup>II</sup>, Cu<sup>II</sup>, Zn<sup>II</sup>, Cd<sup>II</sup> and Hg<sup>II</sup> metal ions with 3,4-dihydro-4- oxobenzofuro[3,2-<em>d</em>]pyrimidine(L) have been synthesised. Their structural features have been investigated on the basis of elemental analyses, electronic and infrared spectral data. The ligand field parameters Dq, B' and <em>β</em><em> </em>are calculated for Co<sup>II</sup>, Ni<sup>lI</sup> and Cu<sup>ll</sup> complexes. The it spectra of the complexes reveal both bidentate and mono-dentate nature of the ligand. The insolubility in common organic solvents and electronic spectra suggest the polymeric octahedral geometry for N<sup>iII</sup>, and distorted octahedral structure for Co<sup>II</sup> and Cu<sup>Il</sup> complexes. An octahedral polymeric structure may be proposed for Zn<sup>II</sup>, Cd<sup>II</sup> and Hg<sup>II</sup> complexes.

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30

Olbrykh, Arina, Gleb Yakovlev, Aleksei Titov, and Elena Shubina. "Noncovalent Interactions in Coordination Chemistry of Cyclic Trinuclear Copper(I) and Silver(I) Pyrazolates." Crystals 15, no. 2 (2025): 115. https://doi.org/10.3390/cryst15020115.

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Group 11 metals form with pyrazolate ligand complexes with a general formula of [MPz]n. The value of “n” varies depending on the type of substituent in the ligand and the metal atom. Copper(I) and silver(I) ions mainly form cyclic di-, tri-, and tetra-nuclear complexes or polymeric structures. Cyclic trinuclear d10 metal pyrazolates [MPzm]3 (M = Cu(I) and Ag(I); Pz = substituted pyrazolate ligand) are of particular interest because their planar structure allows them to form supramolecular aggregates via noncovalent metal–metal, metal–π, and metal–electron donor interactions. Designing complexes based on these interactions has been a focus of research for the last two decades. The ability of cyclic trinuclear copper(I) and silver(I) pyrazolates to form coordination and supramolecular structures determines their properties and potential applications in catalysis, gas sensing, molecular recognition, and photoluminescence. In this review, we discuss noncovalent interactions between cyclic trinuclear silver(I) and copper(I) complexes with various types of ligands.

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31

Banerjee, Subarna, Palanisamy Rajakannu, Raymond J. Butcher, and Ramaswamy Murugavel. "Auxiliary ligand-aided tuning of aggregation of transition metal benzoates: isolation of four different types of coordination polymers." CrystEngComm 16, no. 36 (2014): 8429–41. http://dx.doi.org/10.1039/c4ce01043d.

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The position of benzoic acid substituents and the ability of the auxiliary ligand to act as a chelating or a bridging ligand drive metal benzoates to assemble either as discrete or as polymeric complexes.

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32

B., Sireesha, Sarala Devi Ch., Mohiuddin Rafeeq, and Ram Reddy M.G. "Synthesis of metal complexes with formyl- and acetylthiosemicarbazide." Journal of Indian Chemical Society Vol. 76, Oct 1999 (1999): 498–99. https://doi.org/10.5281/zenodo.5860956.

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Department of Chemistry, University College for Women (Koti), Osmania University, Hyderabad-500 195, India <em>Manuscript received 30 June 1998, revised 28 April 1999, accepted 11 June 1999</em> Cu<sup>II</sup> , Ni<sup>II</sup> and Zn<sup>II</sup> form 1 : 1 complexes with 1-formyl-3-thiosemicarbazide (FTSC) and 1-acetyl-3-thiosemicarbazide (ATSC); but Co<sup>II</sup> forms 1 : 2 complex. All the compleus are non-electrolytes, and polymeric due to coordination by oxygen, sulphur and two nitrogen atoms. The ligand FTSC is a monobasic acid.

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33

Li, Dongni, Bo Gao, and Qian Duan. "Preparation of star-shaped functionalized polylactides by metal porphyrin complexes as both catalysts and cocatalysts." Journal of Porphyrins and Phthalocyanines 23, no. 09 (2019): 1020–27. http://dx.doi.org/10.1142/s1088424619500603.

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Several aluminum porphyrin complexes as catalysts and a copper porphyrin complex as a cocatalyst were prepared. These complexes were characterized by 1H NMR and elemental analysis. These complexes are used for L-lactide polymerization. The kinetic data of the polymerization using complex 2 as catalyst revealed that the polymeric rates were first-ordered in both the monomer and catalyst. There is a linear relationship between lactide conversion and the number-averaged molecular weight of PLA.

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34

Yamada, Yusuke. "Utilization of Polymeric Cyano-Bridged Metal Complexes as Heterogeneous Catalysts." Bulletin of Japan Society of Coordination Chemistry 68 (2016): 16–28. http://dx.doi.org/10.4019/bjscc.68.16.

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35

A., Ray, and N. Gupta S. "Construction of metal template polymer with covalently bound dithizone." Journal of Indian Chemical Society Vol. 78, Oct-Dec 2001 (2001): 663–65. https://doi.org/10.5281/zenodo.5912439.

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Department of Polymer Science and Technology, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata-700 009, India <em>E-mail</em> : sngupta@cubmb.ernet.in      <em>Fax</em> : 91-33-3519755 <em>Manuscript received 10 April 2001</em> Dithizonc complexes of Co<sup>II</sup> , Zn<sup>II</sup>, Ni<sup>II</sup> and Cu<sup>II</sup> have been attached to a copolymer of styrene and acrylic acid which are then crosslinked. The metal ions arc leached out leaving the ligand attached to the polymeric matrix. Absorption capacity of various metal ions in these polymeric ligands have been measured to evaluate the extent of template effect generated.

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36

D., K. DWIVEDI, V. AGARWALA B., and K. DEY A. "Synthesis and Structural Characterisation of 2-Hydroxy-1- naphthalidene-3,5-dinitrobenzoylhydrazone Complexes." Journal of Indian Chemical Society Vol. 65, Jul 1988 (1988): 461–63. https://doi.org/10.5281/zenodo.6278858.

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Chemical Laboratories, University of Allahabad, AIlahabad-211 002 <em>Manuscript received 27 August 1987, revised 18 March 1988, accepted 22 April 1988</em> Polymerisation reactions involving the formation of bipositive metal complexes of Schiff bases are reported. Schiff base acts as a tridentate ligand and oxobridged bi-nuclear dimeric species is formed which is confirmed with the aid or analytical, magnetic, thermal, ir and dr spectral studies. The metal ion is the bridging unit between the donor sites of the ligand, and the polymeric chain grows through consecutive ligand- metal linkages.

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37

Majeed, May S. "Synthesis and Characterization of New Polymeric-Schiff Bases and Their Complexes." BASRA JOURNAL OF SCIENCE 40, no. 3 (2022): 649–65. http://dx.doi.org/10.29072/basjs.20220309.

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Complexations of three new polymeric Schiff base ligands to transition metals (Ni and Zn) were synthesized via the preparation of a Schiff base ligand on Styrene-allyl alcohol (SAA) and two types of polyvinyl alcohol (PVA). These polymers were a supporting agent for preparing Schiff base ligand on it, followed by complexation with transition metals. Modified SAA and PVA polymers with Ni (II) and Zn (II) have been synthesized in order to investigate some transition metal complexes roles in these polymer modifications. The prepared polymeric complexes were confirmed and characterized by FTIR spectroscopy and TGA instrument respectively. The transition metals (Ni and Zn) content was estimated using SEM-EDX analysis

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38

Положенцева, Ю. А., М. В. Новожилова, И. А. Чепурная та М. П. Карушев. "Полимерные комплексы никеля с лигандами саленового типа как многофункциональные компоненты катодов литий-ионных аккумуляторов". Письма в журнал технической физики 47, № 2 (2021): 36. http://dx.doi.org/10.21883/pjtf.2021.02.50544.18495.

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This work describes the method of preparation of composite lithium-ion battery cathodes that allows total replacement of conventional polymer binders and electroconductive carbon black additives with redox-active conductive polymeric nickel complexes of salen-type Schiff base ligands in the electrode layer. The structure and electrochemical behavior of the electrodes prepared by this method have been investigated. Polymeric metal complexes have been shown to successfully perform the functions of binding and conductive components and also reversibly store charge in the lithium iron phosphate cathodes, which could result in the improvement of the specific capacity of the cathode layer, as compared with the conventional electrodes.

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39

Kumar, Manoj, Anita Rani, Hardeep Singh Tuli, Rajshree Khare, and Vinit Parkash. "Synthesis and Spectral Investigations of Polymeric Hydrazone Schiff Base and its Transition Metal Complexes with Promising Antimicrobial, Anti-Angeogenic and DNA Photo-Cleavage Activities." Asian Journal of Chemistry 31, no. 10 (2019): 2331–36. http://dx.doi.org/10.14233/ajchem.2019.22157.

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This report describes the synthesis and exploration of novel Schiff base ligand in the form of a polymer (heptamer) which was prepared by reaction between 3,4-diacetyl-2,5-hexanedione and hydrazine hydrate in ethanol. On further reaction of Schiff base with transition metals ions (Co and Cu) leads to formation of its transition metal complexes. The structural identification of Schiff base ligand and its transition metal complexes were characterized by classical structural techniques like FT-IR, NMR and mass spectra. The free ligand and its transition metal complexes have been screened for in vitro biological activities against various strains of bacteria and fungi. The prepared Schiff base and its metal complexes were also screened for antiangiogenic activity. The results have shown the remarkable antimicrobial and antiangiogenic activities of the Schiff base and its metal complexes.

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40

Guseva, Polina B., Alexander R. Badikov, Oleg S. Butorlin, et al. "Complexation of Lanthanides(III) Ions with Terephthalic Acid in Aqueous Solutions by Potentiometric Titration Combined with Photoluminescence Spectroscopy." Chemistry 7, no. 2 (2025): 57. https://doi.org/10.3390/chemistry7020057.

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The complexation behavior of lanthanide(III) ions with terephthalic acid (1,4-benzene-dicarboxylic acid) in 0.01 M KNO3 aqueous solutions was studied across a broad pH range and at two metal-to-ligand ratios using potentiometric titration combined with photoluminescence spectroscopy. Chemometric analysis of titration curves enabled the determination of relative molar fractions, stability constants, and probable stoichiometry of the formed complexes. In solutions with a 1:2 metal-to-ligand ratio, bis-complexes (two terephthalate ligands per lanthanide ion) predominated, while ligand-rich conditions favored the formation of tetra-complexes (four ligands per metal ion). In alkaline media, bis-complexes transform into mixed hydroxy-terephthalate species. Meanwhile, for the tetra-complexes, the addition of NaOH results in the formation of lanthanide ion hydroxo complexes without organic ligands. The structural diversity of these complexes, driven by the terephthalate ligand’s tendency to maximize denticity, suggested dimeric or oligomeric configurations. The stability constants and structural features of complexes in solution were found to align with those of known solid-state lanthanide–terephthalate polymers, highlighting their potential as models for polymeric structures.

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41

Pham, Duyen N. K., Mrittika Roy, Ava Kreider-Mueller, James A. Golen, and David R. Manke. "More crystal field theory in action: the metal–4-picoline (pic)–sulfate [M(pic) x ]SO4 complexes (M = Fe, Co, Ni, Cu, Zn, and Cd)." Acta Crystallographica Section C Structural Chemistry 75, no. 5 (2019): 568–74. http://dx.doi.org/10.1107/s2053229619004625.

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Seven crystal structures of five first-row (Fe, Co, Ni, Cu, and Zn) and one second-row (Cd) transition metal–4-picoline (pic)–sulfate complexes of the form [M(pic) x ]SO4 are reported. These complexes are catena-poly[[tetrakis(4-methylpyridine-κN)metal(II)]-μ-sulfato-κ2 O:O′], [M(SO4)(C6H7N)4] n , where the metal/M is iron, cobalt, nickel, and cadmium, di-μ-sulfato-κ4 O:O-bis[tris(4-methylpyridine-κN)copper(II)], [Cu2(SO4)2(C6H7N)6], catena-poly[[bis(4-methylpyridine-κN)zinc(II)]-μ-sulfato-κ2 O:O′], [Zn(SO4)(C6H7N)2] n , and catena-poly[[tris(4-methylpyridine-κN)zinc(II)]-μ-sulfato-κ2 O:O′], [Zn(SO4)(C6H7N)3] n . The Fe, Co, Ni, and Cd compounds are isomorphous, displaying polymeric crystal structures with infinite chains of M II ions adopting an octahedral N4O2 coordination environment that involves four picoline ligands and two bridging sulfate anions. The Cu compound features a dimeric crystal structure, with the CuII ions possessing square-pyramidal N3O2 coordination environments that contain three picoline ligands and two bridging sulfate anions. Zinc crystallizes in two forms, one exhibiting a polymeric crystal structure with infinite chains of ZnII ions adopting a tetrahedral N2O2 coordination containing two picoline ligands and two bridging sulfate anions, and the other exhibiting a polymeric crystal structure with infinite chains of ZnII ions adopting a trigonal bipyramidal N3O2 coordination containing three picoline ligands and two bridging sulfate anions. The structures are compared with the analogous pyridine complexes, and the observed coordination environments are examined in relation to crystal field theory.

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42

Petrusenko, Svitlana R., Joachim Sieler, and Vladimir N. Kokozay. "Direct Synthesis of Zinc and Nickel(II) Complexes with 1,4-Diazabicyclo[2.2.2]octane." Zeitschrift für Naturforschung B 52, no. 3 (1997): 331–36. http://dx.doi.org/10.1515/znb-1997-0305.

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Abstract The peculiarities of the formation of zinc and nickel(II) complexes by interaction of metal powder or metal oxide with ammonium salts (halides, nitrate, thiocyanate) were investigated in non-aqueous solutions (methanol, acetonitrile, N,N-dimethylformamide=DMF, dimethylsulfoxide=DMSO) in presence of 1,4-diazabicyclo[2.2.2]octane. The stoichiometry of the com plexes was found to depend on the initial reagent ratio Ni/ZnO:NH4X and Ni/ZnO:Ten. The compounds of compositions Zn(HTen)(H2O)(NO3)3 and Ni(HTen)(Ten)Cl3 were characterized by X-ray crystallography. Both complexes contain five-coordinate metal atoms. The zinc compound possesses monomeric molecular structure whilst the nickel complex is polymeric.

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43

Muraviev, Dmitri N., Patricia Ruiz, Maria Muñoz, and Jorge Macanás. "Novel strategies for preparation and characterization of functional polymer-metal nanocomposites for electrochemical applications." Pure and Applied Chemistry 80, no. 11 (2008): 2425–37. http://dx.doi.org/10.1351/pac200880112425.

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Stabilization of metal nanoparticles (MNPs) in polymeric matrices of different types has proven to be one of the most promising strategies to prevent their aggregation and to retain their properties. Polymer-stabilized MNPs (PSMNPs) and those based on polymer-metal nanocomposite materials are starting to find wide application in various fields of science and technology. In this paper, we demonstrate that metal-polymer nanocomposite membranes (MPNCMs) containing MNPs can easily be prepared in an ion-exchange such as, for example, sulfonated polyetherether ketone (SPEEK) matrix by using the polymeric membranes as nanoreactors for synthesis and to characterize the composition and structure of the formed MNPs. Metal ions (or metal ion complexes) are first incorporated into the polymeric matrix where they undergo reduction, leading to formation of corresponding MPNCMs. Since this technique allows successive metal loading-reduction cycles to be carried out, it enables synthesis of both monometallic and bimetallic (e.g., core-shell) MNPs. The proposed approach is illustrated by synthesis and characterization of MPNCMs containing both monometallic and bimetallic core-shell MNPs, formed by combinations of Pd, Pt, Co, Ni, and Cu, along with their application in electrochemical sensor and biosensor constructions.

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44

Melnik, Milan, Markku Rafael Sundberg, and Rolf Uggla. "Analysis of crystallographic and structural data of polymeric iron-alkaline metal complexes." Main Group Metal Chemistry 34, no. 5-6 (2011): 93–126. http://dx.doi.org/10.1515/mgmc-2012-0900.

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Abstract The present review covers almost 100 polymeric MFe (M=Li, Na, K, Rb, and Cs) compounds. The metal atoms of group 1 as partners with iron atom build up complex polymeric chains. The iron atoms are found in the oxidation states 0, +2, and +3, of which the oxidation state +3 prevails. The coordination number of the iron atom ranges from 2 to 10 (sandwiched). The coordination sphere about the main group 1 metals varies, ranging from tetrahedral to mostly trigonal bipyramid. There are also higher coordination numbers involved, namely, from 6 to 10. The most common ligand atoms are oxygen and nitrogen. There are three compounds displaying distortion isomerism. Several relationships between structural parameters are found and discussed.

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45

Naktode, Kishor, Jayeeta Bhattacharjee, Hari Pada Nayek, and Tarun K. Panda. "Imidazol-2-ylidene-N′-phenylureate ligands in alkali and alkaline earth metal coordination spheres – heterocubane core to polymeric structural motif formation." Dalton Transactions 44, no. 16 (2015): 7458–69. http://dx.doi.org/10.1039/c5dt00490j.

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Synthetic and structural details of imidazol-2-ylidene-N′-phenylureate ligand supported two potassium complexes with a hetero-cubane K<sub>4</sub>O<sub>4</sub> core and a polymeric structure, along with a mixed metal Ca–K complex are presented.

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46

Elbert, Sven M., and Michael Mastalerz. "Metal Salen- and Salphen-Containing Organic Polymers: Synthesis and Applications." Organic Materials 02, no. 02 (2020): 182–203. http://dx.doi.org/10.1055/s-0040-1708501.

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The properties of organic polymeric materials can be chemically fine-tuned by the implementation of functional groups or units within the backbone. Especially the inclusion of coordinated metal centers offers a nearly infinite toolbox to adjust properties and thus potential applications. In particular, salen and salphen complexes are widely known to be highly efficient homogenous catalysts. They are also used as luminescent materials and devices or as supramolecular building blocks. This review focusses on the class of salen- and salphen-containing organic polymers, from 1D to 3D. Besides the comparison of synthetic polymerization methods, properties and applications are discussed, with an emphasis on porous 2D and 3D polymeric metal salphens and salens for heterogeneous catalysis and gas sorption.

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47

(MRS.), L. NALANDA SIIARADA, C. GANORKAR M., and RAMA RAO N. "Structural Study of Metal Chelates derived from Tridentate Ligand." Journal of Indian Chemical Society Vol. 72, Jul 1995 (1995): 439–42. https://doi.org/10.5281/zenodo.5905073.

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Department of Chemistry, University College for Women. Koti, Hyderabad-500 001 Birla Institute of Scientific Research, Asmangadh Palace. Malakpet. Hyderabad-500 036 <em>Manuscript received 4 October 1991. revised 13 October 1992, accepted 13 January 1994</em> Oxovanadium(IV), chmromium(III), manganese(III), iron(II), cobalt(II), nickei(II) and copper(II) complexes of the Schiff base derived from salicylhydrazide and 6-methyl-4-hydr·oxy-3-acetylcoumuin (Mc-HACSH) have been synthesised having 1: 1 metal-ligand ratio. The complexes are of non-electrolytic nature except that of the oxovanadium(IV) complex which is found to be a 1: 1 electrolyte. The ligand acts as dibasic tridentate and forms oxygen-bridged polymeric structures for all complexes except the oxovanadium(IV) where it acts as a monobasic tridentate ligand forming dimeric structure. Distorted octahedral geometry has been proposed for the complexes.

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48

BIPIN, B. MAHAPATRA, and K. KAR SUKHENDU. "Polymetallic Complexes. Part-XXXI. Cornplexes of Cobalt-, Nickel-, Copper-, Zinc-, Cadmium- and Mercury(II) with Chelating Azo Dye Ligands 1-(2'-Hydroxynaphthyl-1')-azo-2-hydroxybenzene, 1-(Acetylacetonyl-3')-azo-2-hydroxybenzene, 3-(3'-Acetoacetanilido)azo-1-hydroxybenzene and 3-(8'-Hydroxyquinonyl-5')- azo-1-hydroxybenzene." Journal of Indian Chemical Society Vol. 68, Oct 1991 (1991): 542–44. https://doi.org/10.5281/zenodo.5969516.

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Post·Graduate Department of Chemistry, G. M'. College, Sambalpur-768 004 <em>Manuscript received 24 September 1990, revised 23 May 1991, accepted 3 September 1991</em> Bis-bidentate title ligands having ONNO. ONOO and ONON potential donor atoms form polymeric complexes with divalent metal ions. As Inferred from analysis. conductance, magnetic. ir. electronic and esr spectral data, the Co<sup>lI</sup>, Ni<sup>ll</sup> and Cu<sup>ll</sup> complexes are six-coordinated with an octahedral or distorted-octahedral configuration and the Zn<sup>ll</sup>, Cd<sup>ll</sup> and Hg<sup>ll</sup> complexes are four-coordinated with a tetrahedral geometry around the metal ions.

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49

Schmidt, Christoph, Wolfgang Beck, Christoph Schmidt, and Wolfgang Beck. "Metallkomplexe von Farbstoffen, IV [1]. Übergangsmetallverbindungen mit den Dianionen von Epindolidion und 2.8-Dimethylepindolidion als Bis(chelat)-Liganden / Metal Complexes of Dyes, IV [1]. Transition Metal Compounds of the Dianions of Epindolidione and 2.8-Dimethylepindolidione as Bis(chelate) Ligands." Zeitschrift für Naturforschung B 48, no. 2 (1993): 189–94. http://dx.doi.org/10.1515/znb-1993-0210.

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AbstractThe dianions of epindolidione and dimethylepindolidione act as bis(chelate) ligands (L) and form deep red polymeric complexes [L′ML]n (M = Ni(II), Co(II); L′ = DMF, PEt3). They react with chloro bridged complexes [(R3P)MCl2]2 (M = Pd, Pt) and [(η5-C5Me5)MCl2]2 (M = Rh, Ir) to give red bis-N,O-chelate complexes (R3P)(Cl)M-μ-L-M (Cl)(PR3) and (η5-C5H5)(Cl)M -μ-L-M(Cl)(η5-C5H5).

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50

Lindblad, Cecilia, Anders Cassel, and Ingmar Persson. "Complex Formation of Alkyl-N-iminodiacetic Acids and Hard Metal Ions in Aqueous Solution and Solid State." Journal of Solution Chemistry 49, no. 9-10 (2020): 1250–66. http://dx.doi.org/10.1007/s10953-020-01025-8.

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Abstract The calcium(II), iron(III) and chromium(III) alkyl-N-iminodiacetate systems have been studied in aqueous solution with respect to stability, acid–base properties and structure. The calcium(II) ion forms only one weak complex with methyl-N-iminodiacetic acid in water, K1 = 12.9 (2) mol–1⋅dm3, while iron(III) and chromium(III) form very stable complexes with alkyl-N-iminodiacetic acids. The calcium(II)–methyl-N-iminodiacetate complex is octahedral in the solid state with most probably water in the remaining positions giving a mean Ca–O bond distance of ca. 2.36 Å. The iron(III) alkyl-N-iminodiacetate complexes have low solubility due to a strong tendency to form polymeric structures. Depending on pH in the solution at their preparation, the degree of hydrolysis in the resulting compound(s) may differ. In the solid state, the polymeric iron(III) alkyl-N-iminodiacetate compounds seem to have the mean composition Fe2O(Cx-IDA)5; the mean Fe–O bond distances to the oxo group and the alkyl-N-iminodiacetate ligands are 1.92 and 2.02 Å, respectively. In these complexes the nitrogen atoms are bound at much longer bond distances, 0.1–0.2 Å, than the carboxylate oxygens. This distribution with short strong Fe–O bonds and much longer and weaker Fe–N bonds is also found in most other structurally characterized iron(III) carboxylated amine/polyamine complexes. The chromium(III) alkyl-N-iminodiacetate complexes are octahedral in both solution and solid state, and the low solubility of the solid compounds indicates a polymeric structure with the ligands bridging chromium(III) ions. Also, chromium(III) binds oxygen atoms in carboxylated amines at significantly shorter distance than the nitrogen stoms. The chromium(III) alkyl-N-iminodiacetate complexes display such slow kinetics at titration with strong base that the back-titration with strong acid shows completely different acid–base properties, thus the acid–base reactions are irreversible.

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