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Artykuły w czasopismach na temat „Imidazole uv vis spectrum”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Sapkota, Kamal Raj, Jahanara Begam, and Shilpi Kumari. "A Novel Imidazole Derivative: Synthesis, Spectral Characterization, and DFT Study." AMC Multidisciplinary Research Journal 4, no. 1 (2025): 79–88. https://doi.org/10.3126/amrj.v4i1.78678.

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A novel Imidazole derivative, (E)-N-((1H-indol-7-yl) methylene)-5-phenyl-1H-imidazol-2-amine (IPA), was synthesized and characterized by elemental analysis, FT-IR, NMR, UV–Vis, and mass spectrometry. Spectral data confirmed the structure and purity of the compound. UV–Vis analysis showed π→π* and n→π* transitions, indicating strong conjugation. The molecular ion peak at m/z 286.12 verified its molecular weight. DFT study at the B3LYP/6-311G(d,p) level exhibits a HOMO–LUMO gap of 2.80 eV, in good agreement with the experimental value (2.70 eV), supporting its electronic structure and optoelectr

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2

Lin, Xin, Mingqiang Huang, Tingting Lu, et al. "Characterization of Imidazole Compounds in Aqueous Secondary Organic Aerosol Generated from Evaporation of Droplets Containing Pyruvaldehyde and Inorganic Ammonium." Atmosphere 13, no. 6 (2022): 970. http://dx.doi.org/10.3390/atmos13060970.

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Imidazole compounds are important constituents of atmospheric brown carbon. The imidazole components of aqueous secondary organic aerosol (aqSOA) that are generated from the evaporation of droplets containing pyruvaldehyde and inorganic ammonium are on-line characterized by an aerosol laser time-of-flight mass spectrometer (ALTOFMS) and off-line detected by optical spectrometry in this study. The results demonstrated that the laser desorption/ionization mass spectra of aqSOA particles that were detected by ALTOFMS contained the characteristic mass peaks of imidazoles at m/z = 28 (CH2N+), m/z =

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3

Ward, Hussein Ali, Taghreed M. Musa, and Zaizafoon Nabil Nasif. "Synthesis and Characterization of some Transition Metals Complexes with new Ligand Azo Imidazole Derivative." Al-Mustansiriyah Journal of Science 33, no. 2 (2022): 31–38. http://dx.doi.org/10.23851/mjs.v33i2.1121.

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AZO complexes synthesized by binding metal ions as Mn(II), Co(II), Ni(II) and Cu(II), with the ligand (L) [ethyl 4-((E)-(5-oxo-1-(((1E,2E)-3-phenylallylidene)amino)-2-thioxo-2,5-dihydro-1H-imidazol-4-yl)diazenyl)benzoate] was prepared from three steps ,first step preparation Schiff base product of condensation reaction by reaction Thiosemicarbazide with cinnamaldeyde, second step preparation the Imidazole ring close by reaction ligand 1 with chloroethylacetate, finally preparation Azo ligand(Diazanium compound) by reaction ligand 2 with benzocain. Characterized the ligands and complexes in the

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4

S., Anitha, Ganapathi M., and Ravi A. "SYNTHESIS OF SUBSTITUTED SULFONAMIDE BEARING IMIDAZOLE DERIVATIVES AND ITS CHARACTERIZATION." International Journal of Applied and Advanced Scientific Research 1, no. 2 (2017): 1–4. https://doi.org/10.5281/zenodo.256148.

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The sulfonamide bearing imidazole derivatives have been synthesized via two stages of chemical reactions. In a first stage, various substituted benzaldehyde condensed with benzil and ammonium acetate in presence L-Proline served as green catalyst. In a second stage, the series of substituted imidazole derivatives were reacted with benzene sulfonyl chloride in the presence of triethyl amine base. All synthesized compounds were characterized by various spectral techniques like UV-Visible, FTIR and <sup>1</sup>H NMR spectral analysis respectively. UV- Visible and FTIR spectra of each of the synth

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5

Timoumi, Abdelmajid, Davoud Dastan, Bassem Jamoussi, et al. "Experimental and Theoretical Studies on Optical Properties of Tetra(Imidazole) of Palladium (II) Phthalocyanine." Molecules 27, no. 19 (2022): 6151. http://dx.doi.org/10.3390/molecules27196151.

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In this work, the optical properties of tetra(imidazole) of palladium phthalocyanine (PdPc(Im)4) in solution form and thin films on glass and fluorine-doped tin oxide (FTO) substrates were investigated via the thermal evaporation technique. The optical band gap was evaluated by ultraviolet–visible spectroscopy (UV-Vis). The energy band gap values were determined based on the Tauc graph. In addition, time-dependent density functional theory (TD-DFT) was used to simulate the UV-Vis absorption spectrum of the (PdPc(Im)4) molecule in the Dimethyl Sulfoxide (DMSO) solution phase. A good correlation

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6

Dunya, Y. Fnfoon, and J. Al-Adilee Khalid. "Synthesis and Spectral Characterization of New Azo Imidazole Ligand 2-[ 2' - (4 - Chloro Phenyl)azo [- 1 - Methyl Imidazole and its Complexes with Ag(I) and Ni(II) ions." Pak. J. Anal. Environ. Chem 23, Special Issue (2023): 207–21. https://doi.org/10.5281/zenodo.7850290.

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   A new azo dye ligand 2-] 2' - (4 - Chloro Phenyl)azo [- 4 - Methyl imidazole (ClPA4-MeI) was prepared by reacting a diazonium chloride salt solution of 2-amino -4- chlorophenol and coupled with 4-methyl imidazole in an alkaline ethanolic solution. The newly synthesized ligand (ClPA4-MeI) was used to form complexes with metal ions like Ag(I) and Ni (II). Elemental analysis (C.H.N), Mass spectrum, FT-IR, UV–Vis, XRD, SEM, and magnetic measurements have all been employed to investigate the structures of the azo dye ligand (ClPA4-MeI) and chelate complexes. Except for Ag(I)-

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7

Martak, Fahimah, Iin Candrawati, and Ayu Widyasari. "Synthesis, Spectral, Anticancer Studies on Cu (II) Complex of 2,4,5-Triphenyl-1H-Imidazole." Jurnal Kimia VALENSI 2, no. 2 (2016): 91–96. http://dx.doi.org/10.15408/jkv.v2i2.3328.

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Schiff bases of 2,4,5-triphenyl-1H-imidazole ligand and Cu(II) complex has been synthesized and characterized by 1H and 13C NMR, elemental analyses, molar conductance, thermal analysis (TGA), magnetic moment measurement, IR and UV-Vis. On the basis spectral studied and analytical data, it is evident that the Schiff base acts as monodentat ligand coordinating via nitrogen atom. The result showed that Cu(II) complex has octrahedral geometry. The studied complex was tested for anticancer activity. The anticancer activity of Cu(II) complex is evaluated against liver Carninoma (HEPG2) cell lines.

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8

Wafaa Jumaah Imran, Ibtihal Kadhim Kareem, and Ruba Riyadh Jaafar. "Synthesis and Spectral identifications of new azo – Schiff base ligand(4Cl-2DIBP) derived from (para-aminobenzylamine) with its some metallic complexes." Journal of Kufa for Chemical Sciences 2, no. 10 (2023): 1–16. http://dx.doi.org/10.36329/jkcm/2023/v2.i10.12257.

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The New Heterocyclic ligand 4-chloro-2-(((4-((4,5-diphenyl-1H-imidazol-2-yl) diazenyl ) benzyl)imino)methyl) phenol (4Cl-2DIBP) was prepared from the condensation of para-aminobenzylamine with 4,5-diphenyl imidazole, followed by the condensation of the resulting compound with 5- chloro-2- hydroxy benzaldehyde. Different analytical and characterization techniques including (Mass,1HNMR, FT-IR and UV-Vis. spectroscopy and C.H.N elemental analysis) in the investigation of Newly prepared ligand. A series of Novel solid metal complexes of this ligand with Co (II), Ni (II), Cu (II), Zn ((II), Cd (II)

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9

Osadchuk, Irina, Nele Konrad, Khai-Nghi Truong, et al. "Supramolecular Chirogenesis in Bis-Porphyrin: Crystallographic Structure and CD Spectra for a Complex with a Chiral Guanidine Derivative." Symmetry 13, no. 2 (2021): 275. http://dx.doi.org/10.3390/sym13020275.

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The complexation of (3aR,7aR)-N-(3,5-bis(trifluoromethyl)phenyl)octahydro-2H-benzo[d]imidazol-2-imine (BTI), as a guest, to ethane-bridged bis(zinc octaethylporphyrin), bis(ZnOEP), as a host, has been studied by means of ultraviolet-visible (UV-Vis) and circular dichroism (CD) absorption spectroscopies, single crystal X-ray diffraction, and computational simulation. The formation of 1:2 host-guest complex was established by X-ray diffraction and UV-Vis titration studies. Two guest BTI molecules are located at the opposite sides of two porphyrin subunits of bis(ZnOEP) host, which is resting in

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10

Heren, Zerrin, Cem Keser, C. Cüneyt Ersanlı, O. Zafer Yeşilel, and Orhan Büyükgüngör. "Synthesis, Spectral and Thermal Studies, and Crystal Structure of cis-Bis(imidazole)bis(picolinato)copper(II) Dihydrate [Cu(pic)2(im)2] ·2H2O." Zeitschrift für Naturforschung B 61, no. 9 (2006): 1072–78. http://dx.doi.org/10.1515/znb-2006-0905.

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Abstract The mixed-ligand picolinato (pic) complex of Cu(II) with imidazole (im), [Cu(pic)2(im)2] ・2H2O, was synthesized and characterized by elemental analysis, magnetic susceptibility, spectral methods (UV/vis and FT-IR), simultaneous TG, DTA techniques, mass spectroscopy, and X-ray diffraction. The complex crystallizes in the monoclinic space group Cc with the following unit cell parameters: a = 16.381(1), b = 9.556(1), c = 5.177(1) Å , β = 119.074(5)°, Z = 4. In the octahedral complex, the picolinato ligands are coordinated to the copper(II) ion as bidentate N,O-donors forming chelate ring

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11

Noor, Siham Sami, and Ibtihal Kadhim Kareem. "Exploring the Anticancer Activity of Gold Complex with Newly Ligand (DDIBM): Synthesis, Spectral Identification and Magnetic Susceptibility of Its Metallic Complexes." Indonesian Journal of Chemistry 24, no. 3 (2024): 822. http://dx.doi.org/10.22146/ijc.89954.

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The new heterocyclic ligand, 5-(dimethylamino)-2-(((2-((E)-(4,5-diphenyl-1H-imidazol-2-yl)diazenyl)benzyl)imino)methyl)phenol (DDIBM), was synthesized via the condensation of p-aminobenzylamine with 4,5-diphenyl imidazole, and the resultant compound was condensed with 4-(dimethylamino)-2-hydroxybenzaldehyde. Various instrumental techniques such as mass, 1H-NMR, IR, C.H.N elemental analysis, and UV-vis spectroscopy were used to analyze a newly synthesized ligand. A novel series of complexes was prepared by complexing the ligand with Ni(II), Cu(II), Co(II), and Au(III) and characterized using so

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12

Fang, Yuanyuan, Laihai Huang, Ningchao Liu, et al. "Effect of porphyrin metal center on synthesis, structure, morphology and oxygen reduction properties of porphyrin encapsulated metal organic frameworks." Journal of Porphyrins and Phthalocyanines 25, no. 01 (2020): 1–9. http://dx.doi.org/10.1142/s1088424620500479.

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A series of different metal centered 5,15-Bis(4-aminophenyl)-10,20-bis(4-bromophenyl)porphyrins (PorM) where M = H2, MnOAc, FeCl, Co or Zn were synthesized, and then encapsulated in zeolite imidazole framework-8 (ZIF-8) by typical template directed strategy to generate PorM@ZIF-8 metal organic frameworks (MOFs). These composites were characterized by UV-vis, FTIR, XRD, FESEM and HRTEM methods. Each prepared PorM@ZIF-8 MOF retained the molecular structure of porphyrin and crystal structure of ZIF-8. It is clearly shown that porphyrin centered metal ions will affect MOFs morphology. Both PorH2@Z

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13

Journal, Baghdad Science. "Synthesis and Spectral Studies of Co(II),Ni(II),Zn(II) and Cd(II) Complexes with Ligand 2-[4- Carboxy methyl phenyl azo] -4,5-diphenyl imidazole (4CMeI)." Baghdad Science Journal 10, no. 2 (2013): 420–31. http://dx.doi.org/10.21123/bsj.10.2.420-431.

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A new chelate complexes of Co(II),Ni(II),Zn(II) and Cd(II) were prepared by reacting these ions with the ligand 2-[4- Carboxy methyl phenyl azo]-4,5-diphenyl imidazole (4CMeI) The preparation were conducted after fixing the optimum conditions such as (pH) and concentration .UV- visible spectra of these complex solutions were studied for a range of (pH) and concentration which obey lampert-Beers Law.The structures of complexes were deduced according to mole ratio method which were obtained from the spectroscopic studies of the complex solutions .The ratios of metal: ligand obtained were (1:2) f

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14

Jawad, Shawket Kadhim, Ebtihal kadhum Kareem, and Ibtehaj Raheem Ali. "Synthesis and Spectral Studies of Co(II),Ni(II),Zn(II) and Cd(II) Complexes with Ligand 2-[4- Carboxy methyl phenyl azo] -4,5-diphenyl imidazole (4CMeI)." Baghdad Science Journal 10, no. 2 (2013): 420–31. http://dx.doi.org/10.21123/bsj.2013.10.2.420-431.

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A new chelate complexes of Co(II),Ni(II),Zn(II) and Cd(II) were prepared by reacting these ions with the ligand 2-[4- Carboxy methyl phenyl azo]-4,5-diphenyl imidazole (4CMeI) The preparation were conducted after fixing the optimum conditions such as (pH) and concentration .UV- visible spectra of these complex solutions were studied for a range of (pH) and concentration which obey lampert-Beers Law.The structures of complexes were deduced according to mole ratio method which were obtained from the spectroscopic studies of the complex solutions .The ratios of metal: ligand obtained were (1:2) f

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15

Liu, Kang, Yaowen Zhang, Liming Deng, et al. "Synthesis, Structure, and Properties of Coordination Polymers Based on 1,4-Bis((2-methyl-1H-imidazol-1-yl)methyl)benzene and Different Carboxylate Ligands." Crystals 8, no. 7 (2018): 288. http://dx.doi.org/10.3390/cryst8070288.

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Three novel coordination polymers, formulated as {[Zn(1,4-bmimb)(PhAA)2]·H2O}n (1), [Cu(1,4-bmimb)0.5(2,6-PyDC)]n (2), and {[Cu(1,4-bmimb)0.5(2-PAC)(HCOO)]·2H2O}n (3) (1,4-bmimb = 1,4-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene; PhAA = phenylacetic acid; 2,6-PyDC = pyridine-2,6-dicarboxylic acid; 2-PAC = 2-pyrazinecarboxylic acid), were synthesized by the self-assembly of mixed ligands with Zn(II) and Cu(II) under solvothermal conditions and characterized by means of single-crystal X-ray diffraction, X-ray powder diffraction, infrared spectra, thermogravimetric analysis, fluorescence spectra

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16

Jarullah, Areej Ali, Nidhal Meteab Khamees, and Taghreed Mohy Al-Deen Musa. "Synthesis of ZnO Nanoparticle and Utilized as a Drug Carrier to Treat Leukemia." Indonesian Journal of Chemistry 23, no. 4 (2023): 1071. http://dx.doi.org/10.22146/ijc.82208.

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This study includes two parts, and the first was the preparation of the Zn(II)complex by reacting N-[4-(5-{(Z)-[(5-oxo-2-sulfanyl-4,5-dihydro-1H-imidazol-1-yl)imino]methyl}furan-2-yl)phenyl]acetamide with ZnCl2. The complex was characterized by using microscopic analysis such as UV-Vis spectrum, LC-MS, FTIR spectrophotometer, measurements of conductivity, magnetic susceptibility, and atomic absorption. The second part was the preparation of the ZnO nanoparticles by dissolving the Zn(II) complex in HNO3 and HCl and its use as a drug transporter to treat leukemia. FSEM, TEM, and XRD were examine

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17

Soumendra, Nath Nandi, Roy Suman, Das Kuheli, Datta Amitabha, and Sinha Chittaranjan. "Synthesis and spectral characterization of some mixed ligand complexes of CuII containing NNS and NN/NO/OO chelating ligands." Journal of Indian Chemical Society Vol. 93, Nov 2016 (2016): 1253–60. https://doi.org/10.5281/zenodo.5639144.

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Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata-700 032, India <em>E-mail</em> : c_r_sinha@yahoo.com <em>Fax</em> : 91-033-24137121 Present address : Institute of Chemistry, Academia Sinica, Nankang, Taipei-115, Taiwan <em>Manuscript received 09 August 2016, revised 19 September 2016, accepted 20 September 2016</em> Cu(NN´S)Cl2 (NN´S : 1-alkyl-2-{(o-thioalkyl)phenylazo}imidazole) reacts with some bidentate chelating ligands like, N,N (2,2´-bipyridine, 1,10-phenanthroline), N,O (oxine, picolinic acid) and O,O (salicylic acid, oxalic acid) to

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18

A., P. Mishra, Gupta Priya, and K. Jain Rajendra. "Effect of chelation on therapeutic potential of drugs : Synthesis and characterization of novel VOII, FeII, CuII and ZnII complexes of ornidazole drug and evaluation of their antibacterial activity." Journal of Indian Chemical Society Vol. 90, Jun 2013 (2013): 867–70. https://doi.org/10.5281/zenodo.5773739.

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Bioinorganic Research Laboratories, Department of Chemistry, Dr. H. S. Gour Central University, Sagar-470 003, Madhya Pradesh, India <em>E-mail</em> : apml9@rediffmail.com, jainrajchem@gmail.com <em>Manuscript received 10 February 2012, revised 15 May 2012, accepted 11 July 2012</em> Complexes of VO<sup>II</sup>, Fe<sup>II</sup>, Cu<sup>II </sup>and Zn<sup>II</sup> transition metal ions with an antibacterial and antiprotozoal drug ornidazole (ONZ) [1-chloro-3-(2-methyl-5-nitroimidazole-1-yl)propane-2-ol] were synthesized and characterized by elemental analysis, IR, UV-Vis, magnetic m

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19

Kazachenko, Aleksandr S., Emine Tanış, Feride Akman, et al. "A Comprehensive Study of N-Butyl-1H-Benzimidazole." Molecules 27, no. 22 (2022): 7864. http://dx.doi.org/10.3390/molecules27227864.

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Imidazole derivatives have found wide application in organic and medicinal chemistry. In particular, benzimidazoles have proven biological activity as antiviral, antimicrobial, and antitumor agents. In this work, we experimentally and theoretically investigated N-Butyl-1H-benzimidazole. It has been shown that the presence of a butyl substituent in the N position does not significantly affect the conjugation and structural organization of benzimidazole. The optimized molecular parameters were performed by the DFT/B3LYP method with 6-311++G(d,p) basis set. This level of theory shows excellent co

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Hasi, Qi-Meige, Yan Fan, Chen Hou, Xiao-Qiang Yao, and Jia-Cheng Liu. "Two new two-dimensional coordination polymers based on isophthalate and a flexibleN-donor ligand containing benzimidazole and pyridine rings: synthesis, crystal structures and a solid-state UV–Vis study." Acta Crystallographica Section C Structural Chemistry 72, no. 10 (2016): 724–29. http://dx.doi.org/10.1107/s2053229616012912.

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In coordination chemistry and crystal engineering, many factors influence the construction of coordination polymers and the final frameworks depend greatly on the organic ligands used.N-Donor ligands with diverse coordination modes and conformations have been employed to assemble metal–organic frameworks. Carboxylic acid ligands can deprotonate completely or partially when bonding to metal ions and can also act as donors or acceptors of hydrogen bonds and are thus good candidates for the construction of supramolecular architectures. Two new transition metal complexes, namely poly[diaqua(μ4-1,4

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Zhang, Chong, Qing-Hong Zhang, and Kou-Lin Zhang. "Band gap, sorption properties and fluorescence sensing behaviour of a novel 1D→2D cathenane-like cobalt(II)–organic framework." Acta Crystallographica Section C Structural Chemistry 75, no. 12 (2019): 1593–604. http://dx.doi.org/10.1107/s2053229619014669.

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A novel hydrolytic stable CoII–organic framework, namely poly[[bis(2-amino-4-sulfonatobenzoato-κO 1)tetraaquatris{μ-1,4-bis[(imidazol-1-yl)methyl]benzene-κ2 N 3:N 3′}dicobalt(II)] tetrahydrate], {[Co(C7H5NO5S)(C14H14N4)1.5(H2O)2]·2H2O} n , (1), based on multifunctional 2-amino-5-sulfobenzoic acid (H2asba) and the auxiliary flexible ligand 1,4-bis[(imidazol-1-yl)methyl]benzene (bix), was prepared using the solution evaporation method. The purity of (1) was confirmed by elemental analysis and powder X-ray diffraction (PXRD) analysis. Complex (1) shows a novel 1D→2D interpenetrating network, whic

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Tu, Nguyen Thi Thanh, Lu Hoang Khang, Nguyen Ngoc Phuong Thao, et al. "Zinc/Cobalt-Based Zeolite Imidazolate Frameworks for Simultaneously Degrading Dye and Inhibiting Bacteria." Journal of Nanomaterials 2022 (September 30, 2022): 1–11. http://dx.doi.org/10.1155/2022/8630685.

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In this work, the zinc/cobalt-based zeolite imidazolate frameworks ((Co/Zn)ZIFs) were synthesized with the solvothermal method. The obtained material was characterized by utilizing scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis diffusive reflectance spectroscopy, and nitrogen adsorption-desorption isotherms. XRD and SEM analyses show that (Co/Zn)ZIFs are composed of nanocrystals with polyhedral shapes of around 50–100 nm and belong to the I-43m space group as those of ZIF-8 and ZIF-67. Optical studies demonstrate a red shift in the absorbance spectrum of (Co/Zn)ZIFs compar

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M. Alhar, Maysaa A. "A Study of the Spectral, Chromatographic and Solubility Characteristics of New Analytical Reagents from Anil-Azo and Their Biological Effects on Bacteria." Biomedical and Pharmacology Journal 15, no. 2 (2022): 1115–26. http://dx.doi.org/10.13005/bpj/2447.

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This study was conducted to create a new reagent from Anil-Azo compounds and study their biological impacts on two types of bacteria. For the first step, four reagents had been created by reaction of p-phenyl diamine in acidic form with 2-formyl-4-methyl phenol in neutral medium to create reagent {1}, which used to produce reagent {2} by reacting it with amino benzothiazole over four hours in the presence of glacial CH3COOH. The reagent {1} was also used to form reagent {3} by reacting it with amino imidazole over two hours. Finally, reagent {3} had been generated by reacting reagent {1} with

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Tirkeso, Radiet Anbessie, Tilahun Wubalem Tsega, and Gebru G/Tsadik Amdemichael. "Synthesis, Characterization, and Antibacterial Activities of 1H-Imidazo [5, 6-f] [1,10] Phenanthroline-2(3H)-Thione and Its Ni(II) and Cu(II) Complexes." Journal of Chemistry 2019 (November 21, 2019): 1–10. http://dx.doi.org/10.1155/2019/7145857.

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As multidrug resistant pathogens are emerging, the search for novel potent drug candidates is ever going. Heterocycles are known by their broad spectrum of biological activities, so a search for a new drug from heterocycles can elevate the chance of success. The aim of this study was to obtain novel potent antimicrobial compounds. In line with this, 1H-imidazo [5, 6-f] [1,10] phenanthroline-2(3H)-thione and its complexes (Ni(II) and Cu(II)) were synthesized, characterized, and evaluated against bacterial strains. The compounds were characterized by elemental analyses (C, H, N, and S), FT-IR, 1

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Wang, Jun, Xiang Rong Liu, Yu Jin Sun, Kan She Li, and Shun Sheng Zhao. "Synthesis, Characterization and DNA-Binding Studies of Transition Metal Complexes with Imidazole Ligands." Advanced Materials Research 233-235 (May 2011): 175–79. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.175.

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A series of novel complexes of transition metal (Co, Fe and Mn) with imidaloze have been synthesized and characterized by Elemental Analysis, FT-IR and UV-Vis Absorption spectroscopy. Based on elemental and spectral data, the complexes were found to be of Co(C3H4N2)4(ClO4)2(1), Fe(C3H4N2)3(ClO4)3(2) and Mn(C3H4N2)4(Ac)2(3) (C3H4N2= imidazole). The three complexes and the ligand (imidazole) display DNA binding ability, ascertained by UV-Vis titration.

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Pratiwi, Restiani Alia, and Asep Bayu Dani Nandiyanto. "How to Read and Interpret UV-VIS Spectrophotometric Results in Determining the Structure of Chemical Compounds." Indonesian Journal of Educational Research and Technology 2, no. 1 (2022): 1–20. http://dx.doi.org/10.17509/ijert.v2i1.35171.

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UV-VIS spectrophotometry is one of the methods used toperform qualitative and quantitative analysis of organic andinorganic compounds. However, until now there has been nofurther research that studies and describes the detailedanalysis of UV-VIS spectral data in terms of determining thestructure of chemical compounds. Therefore, this papercontains guidelines that are used as information on how toread and interpret data from the UV-VIS spectrum in termsof determining the structure of chemical compounds. Stepson how to analyze the UV-VIS spectrum are presented. Thispaper is expected to provide u

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Tang, Qian, Zhengping Xian, Lingjing Li, Hongyu Cao, Lihao Wang, and Xuefang Zheng. "Study on the Photochemical Reaction Process of 4-methyl-7-Hydroxycoumarin and Its Mechanism by Multi-Spectroscopic Technologies." Journal of Physics: Conference Series 2112, no. 1 (2021): 012023. http://dx.doi.org/10.1088/1742-6596/2112/1/012023.

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Abstract The photochemical reaction process of 4-methyl-7-hydroxycoumarin (7H4MC) was studied by UV-Vis spectrometer and fluorescence spectroscopy. The results have shown that the characteristic peak of the UV-Vis spectra at 323 nm of 7H4MC undergoes a significant decrease in absorbance and a slight blue shift when was illuminated; the absorbance of the absorption peak at 279 nm rises, and there is a tendency for new peaks to appear. May be, there are structural changes or new materials generation. The addition of imidazole, VC, 3-indole methanol, GSH and other substances also have different e

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Zhang, Yanyan, Libin Zhang, Dongliang Zhang, et al. "A Method of Evaluating NV centers Concentration by UV–Vis Transmittance Spectra." Journal of Physics: Conference Series 2585, no. 1 (2023): 012001. http://dx.doi.org/10.1088/1742-6596/2585/1/012001.

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Abstract The ultraviolet-visible (UV-Vis) spectrum was not generally considered an available method for measuring the concentration of negatively charged nitrogen-vacancy (NV-, NV center). In this study, we propose the idea of evaluating the concentration of NV center by the slope of the UV-Vis spectrum. To establish this new method we synthesized diamonds with different NV center concentrations by the chemical vapor deposition (CVD) method. We then measured the zero-phonon line (ZPL) intensity of PL spectra at 637 nm and estimated the concentration of the NV centers as a baseline for comparis

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Zhang, Ying, Naren Gerile, Jin Kang Zhang, Ta Na Bao, and O. Tegus. "Synthesis and Optical Absorption Properties of Yttrium (III) Acylaminocarboxylates Complexes." Solid State Phenomena 310 (September 2020): 34–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.310.34.

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Yttrium (III) complexes of Acylaminocarboxylates (N-octanoyl-alaninates, N-octanoyl-phenylalaninate, N-octanoyl-serinates) were prepared by chemical reaction method in methanol solution. The abbreviation of these yttrium (III) complexes were Y(oct-ala)3, Y(oct-phe)3 and Y(oct-ser)3 respectively. These complexes were characterized by elemental analysis, XRD, FT-IR, 1H NMR, UV-Vis and UV-Vis diffuse reflection. WAXD and SAXS profiles show the amorphous structure of the yttrium complexes. FT-IR and 1H NMR spectrum establish the molecular formula, functional group information and coordination stru

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30

Banon, Charles, Deni Agus Triawan, Morina Adfa, Monica Santa Ana Sihite, Ria Nurwidiyani, and Widia Rahmi. "Classification of Makasar Fruit Extract (Brucea javanica L. Merr.) Based on The Level of Ripeness Using a Combination of FTIR and UV-Vis Spectroscopy with Chemometrics." Jurnal Kimia Sains dan Aplikasi 26, no. 12 (2023): 483–88. http://dx.doi.org/10.14710/jksa.26.12.483-488.

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Makasar fruit (Brucea javanica L. Merr) is a medicinal plant frequently utilized in Indonesia for its anti-malarial, anti-diabetic, antioxidant, and antibacterial properties. This research aims to classify extracts from B. javanica fruits based on their ripeness levels using a combination of FTIR and UV-Vis spectroscopy with chemometrics. Makasar fruits were extracted using methanol assisted by ultrasonic technology, resulting in a higher yield of extract from ripe fruit (black in color) than unripe fruit (green in color). The FTIR spectrum was measured at wavenumbers ranging from 4000 to 600

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31

Prevenslik, Thomas V. "ISM spectrum by cosmic dust?" Proceedings of the International Astronomical Union 4, S251 (2008): 263–64. http://dx.doi.org/10.1017/s1743921308021716.

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AbstractThe interstellar medium (ISM) spectrum is usually explained by the response of dust particles (DPs) to the absorption of ultraviolet (UV) and visible (VIS) photons from nearby stars. With regard to the unidentified infrared (UIR) bands, the DPs are thought heated by UV and VIS photons to about 100 K thereby exciting the polycyclic aromatic hydrocarbons (PAHs). However, the UIR bands may be explained with the DPs at 2.7 K. To wit, the UIR bands form by the direct excitation of PAHs by infrared (IR) radiation induced from the absorption of cosmic microwave background (CMB) radiation in D

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32

Monarumit, N., T. Lhuaamporn, D. Schwarz, P. Wathanakul, and W. Wongkokua. "An application of polychromatic UV-Vis-NIR spectroscopy on detection of beryllium treatment in ruby and yellow sapphire." Journal of Physics: Conference Series 2653, no. 1 (2023): 012011. http://dx.doi.org/10.1088/1742-6596/2653/1/012011.

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Abstract The ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy has been essentially used to characterize gem materials and their treatments. The spectrophotometer was designed using a diffraction grating to provide the monochromatic light from a tungsten lamp in analyzing a sample. The signal is recorded by a photodiode, resulting in a characteristic spectrum of a gemstone sample. While the monochromatic UV-Vis-NIR spectrophotometer is used for characterizing treated ruby and yellow sapphire samples; however, some indicative characteristic absorptions could be missing. The technique

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33

Yu, Qiaojun, Hang Yin, Ke Wang, Hui Dong, and Dibo Hou. "Adaptive Detection Method for Organic Contamination Events in Water Distribution Systems Using the UV-Vis Spectrum Based on Semi-Supervised Learning." Water 10, no. 11 (2018): 1566. http://dx.doi.org/10.3390/w10111566.

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A method that uses the ultraviolet-visible (UV-Vis) spectrum to detect organic contamination events in water distribution systems exhibits the advantages of rapid detection, low cost, and no need for reagents. The speed, accuracy, and comprehensive analysis of such a method meet the requirements for online water quality monitoring. However, the UV-Vis spectrum is easily disturbed by environmental factors that cause fluctuations of the spectrum and result in false alarms. This study proposes an adaptive method for detecting organic contamination events in water distribution systems that uses th

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34

Selimović, Enisa, and Tanja Soldatović. "Study on the reactions between dichlorido[2,2′:6′,2″-terpyridine] zinc(II) and biologically relevant nucleophiles in aqueous solution." Progress in Reaction Kinetics and Mechanism 44, no. 2 (2019): 105–13. http://dx.doi.org/10.1177/1468678319825724.

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Substitution reactions of square-pyramidal [ZnCl2(terpy)] complex (terpy = 2,2′:6′,2″-terpyridine) with biologically relevant nucleophiles such as imidazole, glutathione, 1,2,4-triazole, and pyrazine were investigated at pH 7.0 as a function of nucleophile concentration. The reactions were followed under pseudo first-order conditions by UV-Vis spectrophotometry. The substitution reactions comprised two steps of consecutive displacement of chlorido ligands. Different reaction pathways for the first reaction step of nucleophilic substitution were defined. The order of reactivity of the investiga

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35

Isaac, R. S. Rimal, G. Sakthivel, and Ch Murthy. "Green Synthesis of Gold and Silver Nanoparticles UsingAverrhoa bilimbiFruit Extract." Journal of Nanotechnology 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/906592.

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We report on rapid one-step green synthesis of gold and silver nanoparticles using fruit extract ofAverrhoa bilimbi Linn. UV-Vis absorption spectroscopy was used to monitor the quantitative formation of gold and silver nanoparticles. The characteristics of the obtained gold and silver nanoparticles were studied using UV-Vis absorption spectroscopy (UV/Vis), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and Energy-dispersive spectroscopy (EDX). UV/Vis spectrum showed Surface Plasmon Resonance (SPR) for both gold and silver nanoparticles at 540 and 420 nm. T

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36

Alsaee, Saleh K., Ibrahim Abdul Razak, Suhana Arshad, Elham Mzwd, Dian Alwani Zainuri, and Murad Bahadi. "Potential of a new pyrene based chalcone as a dye on DSSC solar cell and optical limiting." IOP Conference Series: Earth and Environmental Science 1281, no. 1 (2023): 012030. http://dx.doi.org/10.1088/1755-1315/1281/1/012030.

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Abstract Herin, this work focuses on the potential of a pyrene-based chalcone named EDPP1 as a sensitizer in DSSC using density functional theory (DFT) concerning FMO and UV-Vis absorption spectrum. The EDPP1 compound was synthesized using Claisen-Schmidt reaction and characterized via FTIR, UV-Vis absorption, and DFT. UV-Vis absorption spectrum revealed that the bandgap of the EDDP1 is E g = 3.5e V with fully transmittance above λ cut off = 499nm and high absorption at UV region. The energy level diagram suggests that EDPP1 is a promising sensitizer in DSSCs as it meets the required dye condi

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37

Fernandes, C. D., D. Johnson, J. C. Bridges, and Monica M. Grady. "UV-Vis spectroscopy of stardust." International Journal of Astrobiology 5, no. 4 (2006): 287–93. http://dx.doi.org/10.1017/s1473550406003363.

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NASA's Stardust mission flew through the coma of comet Wild 2 in January 2004, capturing dust grains as it did so. The grains were returned safely to Earth in January 2006, and are in the process of being distributed to investigators. As members of the Spectroscopy Preliminary Examination Team, we are preparing to analyse Stardust grains. Our contribution is to measure the spectrum of the grains between 200 nm (in the near ultraviolet) and 800 nm (near infrared). The purpose of the measurement is to provide an additional technique for characterizing the grains, one that is complementary to oth

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38

Yuniarti, Elvan, and Ai Nurlaela. "Synthesis and Characterization of Optical Properties of Carbon Quantum Dots (CQD) Based on Mustard Green (Brassica juncea L) Leaf with Urea Addition." Jurnal Kimia Valensi 9, no. 2 (2023): 253–60. http://dx.doi.org/10.15408/jkv.v9i2.34164.

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Carbon quantum dots (CQDs) are a class of fluorescent carbon nanomaterials. Carbon quantum dots (CQDs) were synthesized in this work from Mustard Leaves (Brassica juncea L) with the Addition of Urea via a microwave-assisted reflux method. This research aims to characterize CQDs' optical properties, energy gap, and emission under UV light computationally and experimentally. The studied optical properties obtained the maximum absorption peak observed from the UV-Vis spectrum of CQDs without urea shown at 233 nm. The UV-Vis spectrum of CQDs with the addition of urea (1 g, 1.5 g, and 2 g urea) has

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39

Wang, Haiyan, Yanzhi Wang, Dongxu Liu, Zonghui Sun, and Huicong Wang. "Effects of Additives on Weather-Resistance Properties of Polyurethane Films Exposed to Ultraviolet Radiation and Ozone Atmosphere." Journal of Nanomaterials 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/487343.

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Three polyurethane films were prepared by adding the antioxidant-1010 and the composite stabilizer to the polyurethane matrix, respectively. The accelerated weathering tests were performed by using self-designed UV/ozone aging test device. The color difference, yellowness index, UV-Vis spectrum, and infrared spectrum were recorded with colorimeter apparatus, UV-Vis spectroscopy, and FT-IR spectroscopy, respectively. The results show that, for the polyurethane film, the composite stabilizer can remarkably decrease UV transmission, the antioxidant-1010 and the composite stabilizer can markedly d

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Siti Husnaa Mohd Taib, Kamyar Shameli, Roshafima Rasit Ali, Zahra Izadiyan, and Zatil Izzah Ahmad Tarmizi. "Green Synthesis of Silver Nanoparticles Using Hibiscus sabdariffa Leaves Extract." Journal of Research in Nanoscience and Nanotechnology 3, no. 1 (2021): 76–81. http://dx.doi.org/10.37934/jrnn.3.1.7681.

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The present paper reports the synthesis of silver nanoparticles (Ag-NPs) by a green method using Hibiscus sabdariffa (H. sabdariffa) leaves extract as reductant and stabilizer. The synthesized Ag-NPs were characterized by ultraviolet-visible (UV-vis) spectroscopy, transmission electron microscopy (TEM), atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). UV-vis spectrum of synthesized Ag-NPs showed a peak at 378 nm. TEM analysis revealed that the particles were spherical and irregular in shape and has average size around 56.52 nm. This structure and size of partic

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41

Santhanam, Manikandan, Sivasankar Annamalai, Subramanian Sudanthiramoorthy, and Rajagopal Gopalakrishnan. "A simple strategy for monitoring of aromatic degradation in a chloride mediated electrooxidation process." RSC Advances 5, no. 92 (2015): 75528–32. http://dx.doi.org/10.1039/c5ra13794b.

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42

Zander, M., and W. Friedrichsen. "Preparation and Spectroscopic Characterization of Cyclopenta[1,2-a : 3,4,5-b′c′]dicoronene." Zeitschrift für Naturforschung B 47, no. 9 (1992): 1314–18. http://dx.doi.org/10.1515/znb-1992-0917.

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The non-alternant hydrocarbon cyclopenta[1,2-a : 3,4,5-b′c′]dicoronene (3) has been prepared by aluminium chloride catalyzed dimerization of coronene (1). The UV/VIS absorption spectrum, fluorescence spectrum and fluorescence quantum yield of 3 is reported and compared with that of the alternant isomer benzo[1,2,3-bc:4,5,6-b′c′]dicoronene (2). Relationships observed in the UV/VIS absorption spectra of alternant and non-alternant polycyclic aromatic hydrocarbons and preliminary theoretical investigations (PMO calculations) on two model systems (C, E) are also reported.

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Zhang, Yong Cai, and En Ren Zhang. "Solvothermal Synthesis of CeO₂ Nanoparticles." Advanced Materials Research 236-238 (May 2011): 2000–2003. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.2000.

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Ultrafine CeO2 nanoparticles were synthesized directly via solvothermal treatment of Ce(NO3)3·6H2O powder in toluene at 180 °C for 48 h, and characterized by X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and UV-vis absorption spectrum. The results from XRD, Raman and XPS revealed the formation of pure cubic phase CeO2 with some oxygen vacancies. The TEM image disclosed that the as-synthesized CeO2 comprised nanoparticles of about 5–8 nm. The UV-vis absorption spectrum showed that the as-synthesized CeO2 nanoparticles had a wide

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44

Md., Firoj Hossain, Das Arindam, Dey Sovan, et al. "Recognition of monocarboxylic acids by imidazole based fluorescent receptors." Journal of Indian Chemical Society Vol. 97, No. 11a, Nov 2020 (2020): 2291–99. https://doi.org/10.5281/zenodo.5653690.

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Department of Chemistry, University of North Bengal, Raja Rammohunpur, Darjeeling-734 013, West Bengal, India Department of Chemistry, Alipurduar College, Alipurduar-736 122, West Bengal, India <em>E-mail</em>: firoj01982@gmail.com, rckncs@gmail.com <em>Manuscript received online 12 October 2020, revised and accepted 27 November 2020</em> Pyridyl moiety containing substituted imidazole receptors have been synthesized. Their binding properties with monocarboxylic acids have been studied by UV-Vis, fluorescence method as well as <sup>1</sup>H NMR study.

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Journal, Baghdad Science. "Preparation and Characterization of Some Metal Complexes with Heterocyclic Azo Ligand (4-SuBAI)." Baghdad Science Journal 12, no. 3 (2015): 503–15. http://dx.doi.org/10.21123/bsj.12.3.503-515.

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The preparation and characterization of the Cu (II), Co(II), Ni(II), Zn(II), Cd(II), and Hg(II) metal complexes of heterocyclic azo ligand 2-[(4`-sulphamide phenyl) azo] -4,5-diphenyl imidazole (4-SuBAI) have been studied by elemental analysis, FT-IR and UV-Vis Spectroscopic, magnetic moment and molar conductance methods. The analytical data showed that all chelate complexes were prepared with (metal-ligand) ratio of (1:2). The general formula of these complexes was [ML2X2]. nH2O [were L=2-[(4`-sulphamide phenyl) azo]-4,5-diphenyl imidazole and X=Cl, and the octahedral geometry were suggested

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46

Nikitina, Polina A., Tatiana Yu Koldaeva, Marina A. Zakharko, and Valery P. Perevalov. "Synthesis and Study of Prototropic Tautomerism of 2-(2-Furyl)-1-hydroxyimidazoles." Australian Journal of Chemistry 73, no. 11 (2020): 1098. http://dx.doi.org/10.1071/ch20044.

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Novel 2-(2-furyl)imidazole derivatives were synthesised. 2-(2-Furyl)-1-methoxyimidazoles and 2-(2-furyl)-1-methylimidazole 3-oxides were used as model compounds in the study of the prototropic tautomerism of 2-(2-furyl)-1-hydroxyimidazoles by means of 1H, 13C NMR and UV/vis spectroscopies. It was demonstrated that the interaction of the π-excessive furyl moiety with an electron-withdrawing carbonyl group in position 5 of imidazole stabilised the N-hydroxy tautomeric form in both deuterated chloroform and d6-DMSO. In ethanol the N-oxide tautomer is also present along with the prevailing N-hydro

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47

Habiban, Abdullah M. A., Waleed A. Mahmoud, and Tamara A. Kareem. "Preparation and Characterization of Some Metal Complexes with Heterocyclic Azo Ligand (4-SuBAI)." Baghdad Science Journal 12, no. 3 (2015): 503–15. http://dx.doi.org/10.21123/bsj.2015.12.3.503-515.

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The preparation and characterization of the Cu (II), Co(II), Ni(II), Zn(II), Cd(II), and Hg(II) metal complexes of heterocyclic azo ligand 2-[(4`-sulphamide phenyl) azo] -4,5-diphenyl imidazole (4-SuBAI) have been studied by elemental analysis, FT-IR and UV-Vis Spectroscopic, magnetic moment and molar conductance methods. The analytical data showed that all chelate complexes were prepared with (metal-ligand) ratio of (1:2). The general formula of these complexes was [ML2X2]. nH2O [were L=2-[(4`-sulphamide phenyl) azo]-4,5-diphenyl imidazole and X=Cl, and the octahedral geometry were suggested

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48

Wang, Haimang, Xuehong Wei, and Jianfeng Li. "Synthesis and characterization of six-coordinate iron(II/III) 5,10,15,20-tetrakis(pentafluorophenyl) porphyrinato complexes with non-hindered imidazole ligands." Journal of Porphyrins and Phthalocyanines 22, no. 09n10 (2018): 953–64. http://dx.doi.org/10.1142/s1088424618500530.

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Four bis-imidazole iron(II/III) 5,10,15,20-tetrakis(pentafluorophenyl)porphyrinato (TFPP) complexes, [Fe(TFPP)(1-MeIm)[Formula: see text]], [Fe(TFPP)(1-VinylIm)[Formula: see text]], [Fe(TFPP)(4-MeHIm)[Formula: see text]]Cl and [Fe(TFPP)(1-EtIm)[Formula: see text]]BF[Formula: see text] (1-MeIm [Formula: see text] 1-methylimidazole, 1-VinylIm [Formula: see text] 1-vinylimidazole, 4-MeHIm [Formula: see text] 4-methylimidazole and 1-EtIm [Formula: see text] 1-ethylimidazole) were synthesized and characterized by single-crystal X-ray and UV-vis spectroscopy. A negative correlation is found between

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Zevgitis, Dimitrios, Odette Chaix-Pluchery, Beatrice Doisneau, et al. "Synthesis and Characterization of Al₄SiC₄: A “New” Wide Band Gap Semiconductor Material." Materials Science Forum 821-823 (June 2015): 974–77. http://dx.doi.org/10.4028/www.scientific.net/msf.821-823.974.

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High temperature solution growth of Al4SiC4 single crystals was carried out from the melt of silicon and aluminium pieces in a graphite crucible used as carbon source (typically 1800°C under 1 bar of argon). The obtained crystals, in the mm scale, were then characterized by a variety of techniques including: Raman spectroscopy, transmission electron microscopy techniques, X-ray diffraction and UV-Vis-NIR spectroscopy. A good structural quality was revealed by TEM, ensuring a well resolved Raman spectrum. The UV-Vis transmission spectrum shows an optical gap located around 2-2.5 eV.

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50

Wang, Shuo, Yi Chen Li, Chao Song, En Zhou Liu, and Jun Fan. "Photocatalytic Reduction of CO₂ on Au/TiO₂ Nanocomposite Film." Advanced Materials Research 953-954 (June 2014): 995–98. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.995.

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Plasmonic Au decorated TiO2 nanosheet film was firstly prepared by the combination of a hydrothermal method and a microwave-assisted chemical reduction process. The prepared sample was characterized by scanning electron microscopy (SEM), UV-vis absorption spectrum (UV-vis) and photoluminescence spectrum (PL) respectively. Results show that Au nanoparticles with narrow distribution are uniformly loaded on the nanosheet surface, and the resulted composite nanostructure exhibits distinct surface plasmon absorption and quenched photoluminescence compared to pure TiO2 nanostructure. Photocatalytic

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