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Journal articles on the topic 'Ligand spectrum'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Meng, Jie. "Synthesis and Preparation of Eu(BA)₃Phen and its Fluorescent Falsification-Resistant Screen Printing Ink." Advanced Materials Research 1096 (April 2015): 336–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1096.336.

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Europium complex Eu (BA)3Phen was synthesised by selecting the fine Benzoyl acetone (BA) as the first ligand, o-phenanthroline (Phen) as the second ligand . IR spectrum indicated that europium ion has bonded with the ligands. The fluorescent properties and UV spectrum were studied. And fluorescent falsification-resistant screen printing ink was prepared , the fluorescent ink showed the characteristic emission of Eu3+, showed invisible in the visible light and showed obvious fluorescence under ultraviolet light.

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2

Abbasova, G. G., A. A. Medjidov, R. H. Ismayilov, A. M. Pashajanov, and P. A. Fatullayeva. "Synthesis and characterization of rare earth metal complexes with novel Schiff base." Fine Chemical Technologies 20, no. 1 (2025): 47–54. https://doi.org/10.32362/2410-6593-2025-20-1-47-54.

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Objectives. The work set out to synthesize Schiff base ligands containing a hydrazone moiety of (Z)-2-((E)-1-hydroxyethylidene)hydrazineylidene)-2-phenylacetic acid, as well as their praseodymium, samarium, europium, and gadolinium complexes, and to study their structure.Methods. The structure of ligands was identified by infrared (IR), ultraviolet (UV), and nuclear magnetic resonance (NMR) spectroscopy. The structure of the complexes was confirmed by elemental analysis, IR and UV spectroscopy, and thermogravimetric analysis.Results. The Schiff base ligands containing a hydrazone moiety of (Z)

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3

Choi, Don-Soo, Mu-Young Kim, and Kyung-Woo Hyung. "Electrochemical and Spectrum Properties of 2,7-Naphthalene Ligand Compounds." Korean Journal of Materials Research 19, no. 9 (2009): 510–15. http://dx.doi.org/10.3740/mrsk.2009.19.9.510.

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4

Safaa Mohammed Jawad Radhi, Ibtihal Kadhim Kareem, and Nadia Sadiq Majeed. "Preparation and characterization of new Mixed ligand complexes For some transition metal ions (bivalent) with Schiff- Mannich and Schiff base ligands." Journal of Kufa for Chemical Sciences 3, no. 1 (2023): 1–25. http://dx.doi.org/10.36329/jkcm/2023/v3.i1.13522.

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In this research, new mixed ligand complexes were prepared for complexes of some transitional element ions from the first transition series, which are: cobalt (II), nickel (II), and copper (II). The research included two paths: First: The first path included the preparation of three polycyclic ligands derived from Isatin (L1, L2, and L3), all of these ligands were identified by measuring the melting point and infrared and ultraviolet-visible spectroscopy. Second: The second path included the preparation of Mixed ligand complexes (L1and L2) with cobalt (II), nickel (II), and copper

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5

Kadhim Dakheel, Haitham, and Alaa Asaad Habeeb. "Synthesis and Characterization Studies of new Heterocyclic Azo Compound 2-[2‾-(4,5-Dimethyl thaizolyl azo]-5-Amino Anilin with some Complexes Metal Ions." Muthanna Journal of Pure Science 10, no. 1 (2023): 44–61. http://dx.doi.org/10.52113/2/10.01.2023/44-61.

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This work included the preparation of a new ligand of heterogeneous azo ligands derived from thiazole 2- [2‾-(4,5-Dimethyl thaizolyl azo]-5-Amino Anilin (DMeTAAA) and some of its metallic complexes were diagnosed by means of the infrared spectrum, mass spectrum, nuclear magnetic resonance proton spectra, ultraviolet-visible spectrum, thermogravimetric analysis, and in addition to the careful analysis of the elements. Eight metal complexes were prepared by reaction the prepared ligand with Chromium (III), Iron (II), Cobalt (III), Nickel (II), Copper (II), Zinc (II), mercury (II) and silver (I).

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6

Fortuné, Rose-Verla, Emilie Verguet, Paul O. Oguadinma та Frank Schaper. "[N,N′-Bis(2,6-dimethylphenyl)pentane-2,4-diiminato-κ2 N,N′]trichlorido(tetrahydrofuran-κO)zirconium". Acta Crystallographica Section E Structure Reports Online 63, № 11 (2007): m2822. http://dx.doi.org/10.1107/s160053680704322x.

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The nacnac (pentane-2,4-diiminato) ligand in the title compound, [Zr(C21H25N2)Cl3(C4H8O)], displays a κ2-coordination to the Zr center. Three chlorido ligands and a coordinated tetrahydrofuran (THF) molecule complete the octahedral environment of the metal. Despite the C 2 symmetry observed in the 1H NMR spectrum, the THF molecule is found trans to one of the N atoms of the nacnac ligand. The asymmetric unit contains two molecules. In one THF ligand one C atom and four H atoms are disordered over two sites in the ratio ca 0.58:0.42.

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7

Kinuta, M., J. L. Matteson, and H. A. Itano. "Formation of aryl and aryldiazenyl complexes in reactions of arylhydrazines and aryldiazenes with a synthetic model compound of haemoprotein." Biochemical Journal 240, no. 1 (1986): 81–86. http://dx.doi.org/10.1042/bj2400081.

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The anaerobic reaction of chelated protohaemin, a synthetic model compound of ferrihaemoglobin, with phenyldiazene produced a compound with the visible-absorption spectrum of a ferrihaemochrome. The compound reacted with CN-, which is a ligand of both ferric and ferrous porphyrins, to produce the complex of the synthetic ferrihaemoglobin with CN-. Though the spectrum of the compound formed by the addition of phenyldiazene to chelated protohaemin is characteristic of a ferric porphyrin complex, this compound reacted with both toluene-p-sulphonylmethyl isocyanide and CO, which are strong ligands

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8

Preeti, Singhal, Jain Renuka, and Goyal Deepti. "ELECTRONIC SPECTRAL CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF LANTHANIDE (III) - CEFTAZIDIME COMPLEXES." International Journal of Engineering Technologies and Management Research 5, no. 2 (2018): 57–65. https://doi.org/10.5281/zenodo.1174121.

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<strong><em>The present work describes the spectrochemical study of some Lanthanide (III) - ceftazidime (Ln(III)-CEFZ) complexes. The impact of the ligand environment on electronic spectrum of the lantanide ion with special reference to complexation and nature of Ln-ligand bond has been examined. The energy and intensity parameters for the complexes have also been evaluated. The ligand and all prepared complexes were screened for their antibacterial activities against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus and the results showed that antibacterial activity of ligand

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9

Wang, Li Hua. "Hydrothermal Synthesis and Luminescent Characterization of Zn (II) Complex with 1,4-Bis(2’-formylphenyl)-1,4-dioxabutane Isonicotinoylhydrazone." Advanced Materials Research 424-425 (January 2012): 23–26. http://dx.doi.org/10.4028/www.scientific.net/amr.424-425.23.

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A aroylhydrazone Schiff-base ligand (1, 4-Bis(2’-formylphenyl)-1,4-dioxabutane isonicotinoylhydrazone) and its Zn (II) complex were synthesized by hydrothermal method. The ligand was characterized by IR spectrum, MS spectrum and X-ray single crystal diffraction analysis. The luminescent properties of the ligand and Zn (II) complex material have been investigated in solid and in organic solvents. The results show that the ligand has strong luminescent emission at ca. 454 nm and the fluorescence of Zn (II) complex is very weak.

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10

K., RAMALINGAM, VENKATACHALAM V., THILAGAVATHI M., and THIRUMARAN S. "Cyclic Voltammetric and Electronic Spectral Studies on the Interaction of Simple and Mixed Ligand Complexes containing Planar NiS4 and NiS2P2 Chromophores with Pyridine." Journal of Indian Chemical Society Vol. 74, Jul 1997 (1997): 568–69. https://doi.org/10.5281/zenodo.5908764.

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Department of Chemistry, Annamalai University, Annamalainagar-608 002 <em>Manuscript received 24 November 1995, revised 24 May 1996, accepted 19 June 1996</em> Cyclic Voltammetric and Electronic Spectral Studies on the Interaction of Simple and Mixed Ligand Complexes containing Planar NiS4 and NiS2P2 Chromophores with Pyridine.

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11

Loiseau, Frédérique, Scolastica Serroni, and Sebastiano Campagna. "Electronic Absorption Spectrum and Reduction Behavior of a Multicomponent, Trinuclear Ru(II) Species Containing 2,3-Bis(2'-pyridyl)pyrazine Bridging Ligands and 2,2'-Biquinoline Peripheral Ligands." Collection of Czechoslovak Chemical Communications 68, no. 9 (2003): 1677–86. http://dx.doi.org/10.1135/cccc20031677.

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Electronic absorption spectrum and reduction pattern of a trinuclear Ru(II) species containing 2,3-bis(2'-pyridyl)pyrazine bridging ligands and 2,2'-biquinoline peripheral ligands have been studied and compared with other multinuclear metal complexes of the same family of systems. The structural formula of the compound investigated is [RuCl2{Ru(biq)2(μ-2,3-dpp)}2]4+ (1; biq = 2,2'-biquinoline, 2,3-dpp = 2,3-bis(2'-pyridyl)pyrazine). The electronic absorption spectrum of 1 (in acetonitrile) is dominated by intense spin-allowed ligand-centred bands in the UV region and by moderately intense spin

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12

ساجد محمود لطيف, احمد حسين اسماعيل, and شيماء هادي ناجي. "Structural, Characterization, Biological and Studying the Enzyme Activity of some transition metal complexes with 4- )(2- hydroxy phenyl imino) methyl) -2, 6-dimethoxy phenol." Journal of the College of Basic Education 29, no. 121 (2023): 17–1. http://dx.doi.org/10.35950/cbej.v29i121.10914.

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A new Schiff bases ligand 4- ((2-hyolroxy phenylimino) methyl) -2, 6-dimethoxyphenol derived from condensation of 2- amino phenol with 4-hydroxy -3, 5-dimethoxy benzaldehyde have been synthesized and characterized by spectroscopy, spectra, Mass spectrum and elemental microanalysis (C.H.N). Metal Complexes with ions have been also synthesized and characterized spectroscopic methods spectroscopy, flame atomic absorption, molar conductivity measurements and magnetic susceptibility. These studies indicate that the moler ratio for the complexes. The complexes showed characteristics octahedral geome

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13

شيماء هادي ناجي, احمد حسين اسماعيل, and ساجد محمود لطيف. "Structural, Characterization, Biological and Studying the Enzyme Activity of some transition metal complexes with 4- )(2- hydroxy phenyl imino) methyl) -2, 6-dimethoxy phenol." Journal of the College of Basic Education 29, no. 121 (2023): 17–1. http://dx.doi.org/10.35950/cbej.v29i121.11018.

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A new Schiff bases ligand 4- ((2-hyolroxy phenylimino) methyl) -2, 6-dimethoxyphenol derived from condensation of 2- amino phenol with 4-hydroxy -3, 5-dimethoxy benzaldehyde have been synthesized and characterized by spectroscopy, spectra, Mass spectrum and elemental microanalysis (C.H.N). Metal Complexes with ions have been also synthesized and characterized spectroscopic methods spectroscopy, flame atomic absorption, molar conductivity measurements and magnetic susceptibility. These studies indicate that the moler ratio for the complexes. The complexes showed characteristics octahedral geome

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14

Mamoon, Maream, Suad T. Saad, and Nour Abd Alrazzak. "Synthesis and Characterization of New Triazole Ligand with Some Transition Metals." NeuroQuantology 19, no. 7 (2021): 137–43. http://dx.doi.org/10.14704/nq.2021.19.7.nq21100.

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The work includes synthesis and characterization of new ligand and its complexes with divalent metal ions such as cobalt, nickel, copper and zinc. This project includes firstly, the synthesis of Schiff base by reacting P-aminoacetophenone with 2-amino-6-methylpyridine by the reflux reaction for 6 hr. and at 70 ° C. The second step involves the synthesis azo-Schiff base containing ligand which was prepared by the reaction of the Schiff base with the heterocyclic 1,2,4-triazole. The prepared ligand was characterized using spectroscopic methods such as Infrared spectrum, UV-visible spectrum, 1HNM

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15

Abbasova, G. G., A. M. Pashajanov, M. I. Ganbarova, S. M. Gasanova, Z. A. Mammadova, and A. M. Nasibova. "SYNTHESIS AND CHARACTERIZATION OF NEW METAL COMPLEXES WITH TRIDENTATE HYDRAZONE LIGAND." Azerbaijan Chemical Journal, no. 4 (November 14, 2023): 84–90. http://dx.doi.org/10.32737/0005-2531-2023-4-84-90.

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Considering necessity of application of Schiff base ligands, containing hydrazone moiety, there were synthesized 2-hydroxy-1-naphtaldehyde acetylhydrazone and its metal complexes. A tridentate ligand with hydrazone moiety was synthesized on the basis of acetylhydrazine and 2-hydroxy-1-naphthoic aldehyde. The characterization and structure of it was identified by IR, UV- and NMR-spectroscopy. The electronic absorption spectrum of the ligand shows absorption bands in the range of max 237–320 nm. 1H NMR (300 MHz, CD4O):  6.90–8.21, 9.31, 10.52. Recrystallization occured from an ethanol. Mel¬tin

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16

Cavicchioli, M., Filipe Boccato Payolla, and Antonio Carlos Massabni. "Síntese de novos complexos de platina(II) de interesse biológico. Um novo complexo dinuclear de platina(II) com 5-fluorouracil." Eclética Química Journal 40, no. 1 (2015): 180. http://dx.doi.org/10.26850/1678-4618eqj.v40.1.2015.p180-185.

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Many strategies have been used for the treatment of cancer and, following the success of cisplatin and carboplatin, metal complexes have been excelled and showed efficiency on the treatment of many types of cancer. The use of ligands that already have antitumor activity allows an increase on the drugs efficiency. In this work, synthesis of obtained a binuclear compound of platinum and 5-fluorouracil is described. The compound was characterized by elemental analysis and the results show a molar ratio of 2:1 (M:L). The IR spectra shows the complexation of the ligands to the metal by the N atoms

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17

Kaarsholm, N. C., A. M. Kolstrup, S. E. Danielsen, J. Holm, and S. I. Hansen. "Ligand-induced conformation change in folate-binding protein." Biochemical Journal 292, no. 3 (1993): 921–25. http://dx.doi.org/10.1042/bj2920921.

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C.d. and fluorescence spectroscopy have been used to investigate the effect of ligand binding on the structure and stability of folate-binding protein (FBP) from cow's whey. The c.d. spectrum of unligated FBP predicts the following secondary structure: 22% helix, 25% antiparallel beta-strand, 5% parallel beta-strand, 17% turn and 31% random-coil structure. Folate binding to FBP results in significant changes in the c.d. spectrum. Analysis of the spectrum shows a 10% decrease in antiparallel beta-strand as a result of ligand binding. Folate binding also leads to strong quenching of FBP tryptoph

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18

Florence, S. Sasi, M. Umadevi, D. Lawrence Arockiasamy, and Rita John. "Tailoring of Morphology and Optical Properties of Bishydrazone-Capped ZnSe Nanorods." Australian Journal of Chemistry 68, no. 10 (2015): 1508. http://dx.doi.org/10.1071/ch14672.

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Hydrazone derivatives containing heterocyclic moieties have interesting ligational features. Various heterocyclic base ligands have been gradually used to synthesize nanomaterials; however, adapting task-specific ligand systems to guide the synthesis path towards desirable nanostructures and morphologies is rare. In this article, bishydrazone was used as a ligand to purposely modify the morphological structure of the zinc selenide nanostructures via wet chemical reaction method at room temperature. The as-prepared ZnSe nanorods are relatively uniform with an average diameter of ~100 nm at the

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19

Tai, Xi Shi. "Synthesis and Luminescence Characteristics of Zn (II) Complexes with 2’-Hydroxyacetophenone-Furan-2-Carbohydrazine." Advanced Materials Research 534 (June 2012): 131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.534.131.

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A novel aroylhydrazone ligand, 2’-hydroxyacetophenone-furan-2-carbohydrazine, has been synthesized and characterized by elemental analysis, infrared spectrum and X-ray single crystal diffraction. The complex of Zn (II) with 2’-hydroxyacetophenone-furan-2-carbohydrazine has also been synthesized and characterized by elemental analysis, infrared spectrum and UV spectra. The luminescence properties of ligand and its Zn (II) complex were investigated in solid, respectively. The results show that the ligand exhibit yellow-green luminescence at 531 nm and the Zn (II) complex exhibit blue luminescenc

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20

Kataoka, Yusuke, Nozomi Tada, Junya Omaki, Kanami Matsubara, Natsumi Yano, and Makoto Handa. "Paddlewheel-Type Diruthenium(II) Naphthyridine Complex with Electron-Withdrawing Trifluoroacetate Ligands." Chemistry 7, no. 3 (2025): 72. https://doi.org/10.3390/chemistry7030072.

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A ligand exchange reaction between [Ru2(npc)2(O2CMe)2] (1; npc = 1,8-naphthyridine-2-carboxylate) and trifluoroacetic acid yielded the diruthenium naphthyridine complex with two trifluoroacetate ligands, [Ru2(npc)2(O2CCF3)2] (2), which was structurally characterized by electrospray ionization mass spectrometry, elemental analysis, infrared spectrum, and synchrotron single-crystal X-ray diffraction. The crystal structure of 2 adopts a paddlewheel-type structure in which two npc and two O2CCF3 ligands are coordinated in a cis-2:2 arrangement around the Ru2 core. The temperature-dependent magneti

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21

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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22

Muniz-Miranda, Francesco, Maria Cristina Menziani, and Alfonso Pedone. "On the opto-electronic properties of phosphine and thiolate-protected undecagold nanoclusters." Phys. Chem. Chem. Phys. 16, no. 35 (2014): 18749–58. http://dx.doi.org/10.1039/c4cp02506g.

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A schematic description of the UV-vis spectrum of Au<sub>11</sub>(PPh<sub>3</sub>)<sub>7</sub>Cl<sub>3</sub> nanoclusters. Metal → metal transitions are ubiquitous, metal → ligand transitions appear above the visible threshold, while ligand → metal and ligand → ligand transitions are much rarer in the investigated range of energies.

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23

Borhade, S. S., and P. T. Tryambake. "Bis(indolyl)methane and 8-Hydroxyquinoline Derivative based Mixed Ligand Metal Complexes: Synthesis, Characterization, Antimicrobial Screening and Molecular Docking Study." Asian Journal of Chemistry 34, no. 8 (2022): 2041–48. http://dx.doi.org/10.14233/ajchem.2022.23728.

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Present study described the synthesis of mixed ligand metal complexes of Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II). Metal complexes were synthesized by two ligands such as 8-hydroxyquinoline derivative (primary ligand) and bis(indolyl)methane derivative (secondary ligand). The ligands and their transition metal complexes were characterized by IR, 1H NMR, mass spectrum, elemental analysis, TGA, electronic spectra (UV) and molar conductance. The results of analysis predicted that both ligands are bidentate and resulting complexes are ML1L2 type with molar ratio 1:1:1. To screen their bi

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24

Katzenellenbogen, J. A., and R. Muthyala. "Interactions of exogenous endocrine active substances with nuclear receptors." Pure and Applied Chemistry 75, no. 11-12 (2003): 1797–817. http://dx.doi.org/10.1351/pac200375111797.

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Nuclear receptors function as ligand-regulated transcription factors and modulate the expression of sets of genes in response to varying concentrations of ligands. The ligand modulators can be endogenous metabolites that function as hormones, or they can be exogenous substances, such as pharmaceutical agents or environmental substances of natural or man-made origin, which in some cases can cause endocrine disruption. Ligands modulate nuclear receptor activity by binding to their ligand-binding domains and stabilizing conformations that lead either to transcriptional activation or repression. T

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25

Ohura, K., I. M. Katona, L. M. Wahl, D. E. Chenoweth, and S. M. Wahl. "Co-expression of chemotactic ligand receptors on human peripheral blood monocytes." Journal of Immunology 138, no. 8 (1987): 2633–39. http://dx.doi.org/10.4049/jimmunol.138.8.2633.

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Abstract Directed migration of monocytes is dependent upon interaction of cell surface receptors and specific chemotactic ligands. To determine whether circulating human monocytes express multiple chemotactic ligand receptors or whether subpopulations of monocytes exist with a single receptor specificity, nonoverlapping fluorescent probes for two chemotactic ligands, N-formyl methionyl leucyl phenylalanine (FMLP) and C5a, were developed to simultaneously evaluate the expression of receptors for these ligands on individual monocytes. The subsequent incubation with different fluorochrome labeled

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L., S. Sbirna, Mursesan V., Sbirna S., Mursesan N., and I. Lepadatu C. "Complex compounds of ions with d6-10 electronic configuration with bidentate heterocyclic ligands (N, S)." Journal of Indian Chemical Society Vol. 81, Feb 2004 (2004): 150–52. https://doi.org/10.5281/zenodo.5830169.

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Faculty of Chemistry, University of Craiova, Calea Bucuresti 165, Craiova, Romania <em>E-mail</em> : albatros@dahas.ro        <em>Fax</em>: 3-010-40-51-19-70-48 lnstitute of Physical Chemistry, Romanian Academy, Splaiul Independentei, 202 B Bucharest, Romania <em>Manuscript received 4 December 2002, revised 2 July 2003, accepted 22 August 2003</em> Some new complexes of Fe<sup>II</sup>, 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> have been synthesized with bidentate heterocyclic ligand (N, S) of the

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le Maire, Teyssier, Balaguer, Bourguet, and Germain. "Regulation of RXR-RAR Heterodimers by RXR- and RAR-Specific Ligands and Their Combinations." Cells 8, no. 11 (2019): 1392. http://dx.doi.org/10.3390/cells8111392.

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The three subtypes (α, β, and γ) of the retinoic acid receptor (RAR) are ligand-dependent transcription factors that mediate retinoic acid signaling by forming heterodimers with the retinoid X receptor (RXR). Heterodimers are functional units that bind ligands (retinoids), transcriptional co-regulators and DNA, to regulate gene networks controlling cell growth, differentiation, and death. Using biochemical, crystallographic, and cellular approaches, we have set out to explore the spectrum of possibilities to regulate RXR-RAR heterodimer-dependent transcription through various pharmacological c

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28

Birin, Kirill P., Yulia G. Gorbunova, and Aslan Yu Tsivadze. "The approach to the direct interpretation of 13C NMR of heteroleptic triple-decker (porphyrinato)(phthalocyaninato) lanthanum(III) without carbon labeling." Journal of Porphyrins and Phthalocyanines 15, no. 07n08 (2011): 667–73. http://dx.doi.org/10.1142/s1088424611003598.

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A complete assignment of 13C NMR resonance peaks in the spectrum of heteroleptic triple-decker (porphyrinato)(phthalocyaninato) lanthanum of type [Br4TPP]La[(15C5)4Pc]La[Br4TPP] ( Br4TPP = 5,10,15,20-tetrakis-(4-bromophenyl)-porphyrinato-ligand, (15C5)4Pc = tetrakis-(15-crown-5)-phthalocyaninato-ligand) is performed. Application of set of gradient-enhanced homonuclear 1H-1H-correlation techniques (COSY and NOESY) allowed the unambiguous interpretation of proton spectrum of the complex. Application of INEPT polarization transfer technique allowed to separate quaternary carbon resonances from pr

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Avagyan, Nane A., Pavel S. Lemport, Mariia V. Evsiunina, et al. "Pyrrolidine-Derived Phenanthroline Diamides: An Influence of Fluorine Atoms on the Coordination of Lu(III) and Some Other f-Elements and Their Solvent Extraction." International Journal of Molecular Sciences 24, no. 6 (2023): 5569. http://dx.doi.org/10.3390/ijms24065569.

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Three pyrrolidine-derived phenanthroline diamides were studied as ligands for lutetium trinitrate. The structural features of the complexes have been studied using various spectral methods and X-ray. The presence of halogen atoms in the structure of phenanthroline ligands has a significant impact on both the coordination number of lutetium and the number of solvate water molecules in the internal coordination sphere. The stability constants of complexes with La(NO3)3, Nd(NO3)3, Eu(NO3)3, and Lu(NO3)3 were measured to demonstrate higher efficiency of fluorinated ligands. NMR titration was perfo

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Kassim, Karimah, and Muhammad Azwan Hamali. "Microwave Assisted Synthesis and Characterisation of Trinuclear Zinc(II) Schiff Base Complexes Derived from m-phenylenediamine and Salicylaldehyde." Scientific Research Journal 14, no. 1 (2017): 29. http://dx.doi.org/10.24191/srj.v14i1.2700.

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A series of Schiff base ligand, SALMPD, and its mono- and trinuclear Zn(II) metal complexes were synthesised from m-phenylenediamine and salicylaldehyde in alcoholic solution. The synthesis of ligand and mononuclear complex were synthesised using conventional condensation method, while the trinuclear complex was done using microwave-assisted synthesis method. The structure of each compound was elucidated by elemental analysis, infrared and 1H NMR spectroscopy. The infrared spectrum of SALMPD shows a strong azomethine (C=N) band at 1621.62cm-1, indicates the formation of the ligand. Upon comple

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Kassim, Karimah, and Muhamad Azwan Hamali. "Microwave Assisted Synthesis and Characterisation of Trinuclear Zinc(II) Schiff Base Complexes Derived from m-phenylenediamine and Salicylaldehyde." Scientific Research Journal 14, no. 1 (2020): 29. http://dx.doi.org/10.24191/srj.v14i1.9370.

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A series of Schiff base ligand, SALMPD, and its mono- and trinuclear Zn(II) metal complexes were synthesised from m-phenylenediamine and salicylaldehyde in alcoholic solution. The synthesis of ligand and mononuclear complex were synthesised using conventional condensation method, while the trinuclear complex was done using microwave-assisted synthesis method. The structure of each compound was elucidated by elemental analysis, infrared and 1H NMR spectroscopy. The infrared spectrum of SALMPD shows a strong azomethine (C=N) band at 1621.62cm-1, indicates the formation of the ligand. Upon comple

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Al-Radadi, Najlaa S., Ehab M. Zayed, Gehad G. Mohamed, and Hayam A. Abd El Salam. "Synthesis, Spectroscopic Characterization, Molecular Docking, and Evaluation of Antibacterial Potential of Transition Metal Complexes Obtained Using Triazole Chelating Ligand." Journal of Chemistry 2020 (February 24, 2020): 1–12. http://dx.doi.org/10.1155/2020/1548641.

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Mononuclear chelates of Ni(II), Co(II), Fe(III), Cd(II), and Cu(II) derived from triazole novel tridentate ligands were prepared and characterized by different spectroscopic methods. The metal to ligand ratio was 1 : 2, which was revealed by elemental analysis. All the complexes were electrolytic in nature as suggested by the conductivity measurements. IR pointed out that the coordination of the triazole ligand toward the metal ions was carried out through N amino and S thiophenolic atoms. The complexes were found to have octahedral geometry, and their thermal stability was also studied. The X

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AL-HILFI, Jassim Abas, Zaidoon Jawad KAHDIM, Tahseen Saddam FANDI, and Luma M. AHMED. "STRUCTURAL STUDY OF COMPLEXES FROM HEXAFLUOROACETYLACETONE, PYRAZOLE, AND ITS PYRAZOLE DERIVATIVE WITH SOME METALS BY FT-IR, AND 1H-NMR." Periódico Tchê Química 17, no. 34 (2020): 756–68. http://dx.doi.org/10.52571/ptq.v17.n34.2020.780_p34_pgs_756_768.pdf.

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The series complex formation nickel(II) or cobalt(III) with hexafluoroacetylacetone, pyrazole, 3,5-dimethylpyrazole, and 3,5-bis(trifluoromethyl)-1H-pyrazole were prepared. The first reaction step included the synthesis of the complex using hexafluoroacetylacetone as a ligand with Co(III) or Ni(II), metals with high spin with π donate and enol-form of the ligand. This formed complex was identified by FT-IR, 1H-NMR spectroscopy, and magnetic susceptibility calculation. Whereas, the second reaction step to produce the complex depended upon mixing water and pyrazole and using it as ligands with C

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Guo, Xiaoyun, Junli Wang, Yao Liu, et al. "Enhanced Selective Separation of Pu(IV) and U(VI) Using Novel Diethylene Glycolamide Ligand." Separations 12, no. 5 (2025): 106. https://doi.org/10.3390/separations12050106.

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Developing a new efficient separation ligand based on the “CHON” principle to address the limitations of phosphorus containing extractants in nuclear fuel reprocessing can help further simplify the process flow and reduce the amount of secondary waste. Building upon this critical need, a novel ligand was developed through a strategic application of the Hard and Soft Acids and Bases (HSAB) theory, integrating a soft donor nitrogen atom into the linear architecture of bis-diglycolamide. This groundbreaking ligand, named N,N′-bis[2-(2-(N,N-dioctylcarbamoyl)ethoxy)ethylacetamido]-N″-diethylenetria

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Hasan, Rawaa Ch, Faiq F. Karam, and Sadiq J. Baqir. "Synthesis and characterization of a novel organic reagent and its complexes with Cu (||), Cr(|||), Co(|||) and Fe(|||) metal." IOP Conference Series: Earth and Environmental Science 1029, no. 1 (2022): 012027. http://dx.doi.org/10.1088/1755-1315/1029/1/012027.

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Abstract This work included the preparation of a series of metal complexes with the new organic azo reagent dye. The donor the prepared ligand is It a derivative of 2-amino-6-methoxy benzothiazolyl mediated by a diazonium solution with a 4-methoxy phenol solution. The preparation of the organic reagent 2-[2–(6-Methoxy benzothiazolyl ) azo ]-4-methoxy phenol (6-MBTAMP), where this reagent characterized by several spectroscopic techniques, which included the H’-NMR proton spectrum, the C’3-NMR carbon spectrum, and also a series of metallic complexes for this ligand were prepared. It included fou

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Logie, Colin, Mark Nichols, Kathy Myles, John W. Funder, and A. Francis Stewart. "Positive and Negative Discrimination of Estrogen Receptor Agonists and Antagonists Using Site-Specific DNA Recombinase Fusion Proteins." Molecular Endocrinology 12, no. 8 (1998): 1120–32. http://dx.doi.org/10.1210/mend.12.8.0155.

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Abstract Activation of the estrogen receptor (ER) by hormone involves at least two steps. First, hormone binding initially relieves repression, a property imposed on ER in cis by its ligand-binding domain (EBD). Subsequently, the derepressed ER binds specific genomic sites and regulates transcription. In addition to the natural hormone, ER binds a broad range of ligands that evoke a spectrum of responses ranging from full ER activation by agonists to partial activation and inhibition by partial or complete antagonists. How these different ligands evoke different ER responses remains unclear. T

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Ben Nasr, Mahjouba, Emmanuel Aubert, Enrique Espinosa, Frederic Lefebvre, and Cherif Ben Nasr. "Synthesis and physico-chemical studies of a novel coordination compound ZnCl2(C6H4FNH2)2." JOURNAL OF ADVANCES IN CHEMISTRY 10, no. 3 (2014): 2502–11. http://dx.doi.org/10.24297/jac.v10i3.2292.

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A new Zn(II) complex with the monodentate ligand 3-fluoroaniline, ZnCl2(C6H4FNH2)2, has been prepared and characterized by single crystal X-ray diffraction, Solid state NMR, IR and UV-visible spectroscopies. The Zn(II) ion, located on a special position, is tetracoordinated by two nitrogen atoms of two 3-fluoroaniline monodentate ligands and two chlorine ligands. In the atomic arrangement, the ZnCl2(NH2)2 entities are interconnected via N-H…Cl hydrogen bonds to form inorganic layers parallel to the (b, c) plane. The organic 3-fluorophenyl groups are located between these layers and connect eac

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Gondko, Roman, Eligiusz Serafin, Janusz Mazur, Bogusława Jeżowska-Trzebiatowska, and Adam Jezierski. "The Kinetics of the Reaction of Thiocyanate and Nitrite Ions with Orconectes limosus Oxyhemocyanin." Zeitschrift für Naturforschung C 40, no. 9-10 (1985): 677–81. http://dx.doi.org/10.1515/znc-1985-9-1016.

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Abstract The time course of the reaction of oxyhemocyanin from the arthropod Orconectes limosus with SCN− and NO2− was investigated. After addition of one of these anions to oxyhemocyanin solution an exponential decay of A340 was found, indicating a removal of oxygen from the active site. The order of reaction with respect to ligand was about 3 for thiocyanate and about 1 for nitrite. On this basis, a possible arrangement of ligands in the active site has been proposed. The final product of reaction with SCN− yielded a mononuclear copper EPR spectrum while the reaction product with NO2− gave

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Uhrín, Duan, A. V. Krishna Prasad, Jean-Robert Brisson, and David R. Bundle. "Carbohydrate-antibody interactions by NMR for a 13C-labelled disaccharide ligand." Canadian Journal of Chemistry 80, no. 8 (2002): 904–7. http://dx.doi.org/10.1139/v02-063.

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Incorporation of a 13C label into a carbohydrate ligand, methyl 3-O-(3,6-dideoxy-α-D-xylohexopyranosyl)-2-O-methyl-α-D-mannopyranoside permitted by NMR spectroscopy the study of its binding to the Fab from a monoclonal antibody, Se 155-4. The signals of the free and bound form were observed in the 13C spectrum of the carbohydrate-protein complex. The dissociation rate constants were consequently determined by full lineshape analysis of the 13C spectrum. Comparison with simplified analyses relying only on the linewidth of the 1H and 13C signals of the free ligand were made and the justification

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Serth-Guzzo, Judith A., Ilona Turowska-Tyrk, Martin K. Safo, F. Ann Walker, Peter G. Debrunner, and W. Robert Scheidt. "Characterization of the mixed axial ligand complex (4-cyanopyridine)(imidazole)(tetramesitylporphinato)iron(iii) perchlorate. Stabilization by synergic bonding." Journal of Porphyrins and Phthalocyanines 20, no. 01n04 (2016): 254–64. http://dx.doi.org/10.1142/s1088424616500206.

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The reaction of [Fe(TMP)(OClO[Formula: see text]], where TMP is the dianion of tetramesitylporphyrin, with a combination of a strong [Formula: see text]-acceptor ligand and a [Formula: see text]-donating imidazole can lead to the preparation of mixed-ligand complexes [Fe(Porph)(4-CNPy)(L)][Formula: see text] where L is imidazole itself or 1-acetylimidazole and 4-cyanopyridine is the strong [Formula: see text] acceptor ligand. The stability of the new mixed-ligand pair is the presumed result of synergic bonding between the two axial ligands. The molecular structure and other characterization of

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Sakhare, Kuldeep B., Kirti N. Sarwade, Yogesh N. Bharate, and Mahadeo A. Sakhare. "Eco-friendly synthesis of azo Schiff base ligand and its metal complexes: Anticancer, antidiabetic and antimicrobial activities." Mongolian Journal of Chemistry 26, no. 53 (2025): 40–48. https://doi.org/10.5564/mjc.v26i53.3791.

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Now a days Cancer, Diabetics and other diseases are become major issue of the society. Due to this synthesis of potential medicines against it is a major challenge to the researcher and hence Schiff base ligand became an attracting class of researcher. The azo Schiff base ligands are most widely used in various fields such as medicinal, pharmacological, biological etc. due to its broad spectrum of biological activity. In this research paper we have synthesized the Azo-Schiff base ligand and its transition metal complexes by simple griding method. Synthesis via green approach and biological evo

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Vanquickenborne, L. G., K. Pierloot, and E. Duyvejonck. "Theoretical analysis of the ligand field spectrum of K3CoF6." Chemical Physics Letters 224, no. 1-2 (1994): 207–12. http://dx.doi.org/10.1016/0009-2614(94)00524-9.

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Ceulemans, A., B. Coninckx, C. Görller-Walrand, H. Jacobs, and J. Bock. "The ligand field spectrum of K3[Cr(OH)6]." Chemical Physics Letters 150, no. 1-2 (1988): 127–28. http://dx.doi.org/10.1016/0009-2614(88)80408-1.

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Abbas, Rana Abdulilah, Amer J.jarad, Ion Marius Nafliu, and Aurelia Cristina Nechifor. "Synthesis, Characterization and Antibacterial Activity from Mixed Ligand Complexes of 8-Hydroxyquinoline and Tributylphosphine for Some Metal Ions." Revista de Chimie 70, no. 1 (2019): 36–40. http://dx.doi.org/10.37358/rc.19.1.6846.

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Co+2, Ni+2, Cu+2 as well Zn+2 compounds mixed ligand from 8-hydroxyquinoline(8-HQ) also tributylphosphine (PBu3) have been attended at aquatic ethyl alcohol for (1:2:2) (M:8-HQ:PBu3). Produced complexes have been identified by utilizing atomic absorption flame, FT-IR as well UV-Vis spectrum manners also magnetic susceptibility as well as conductivity methods. At addendum antibacterial efficiency from the ligands as well complexes oboist three species about bacteria have been as well examined. Ligands and their complexes show good bacterial efficiencies. Of the gained datum the octahedral geome

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Marinova, Petya, Dimitar Stoitsov, Nikola Burdzhiev, et al. "Investigation of the Complexation Activity of 2,4-Dithiouracil with Au(III) and Cu(II) and Biological Activity of the Newly Formed Complexes." Applied Sciences 14, no. 15 (2024): 6601. http://dx.doi.org/10.3390/app14156601.

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The goal of this study is to synthesize, determine the structure, and examine the antimicrobial properties of novel Cu(II) and Au(III) complexes of 2,4-dithiouracil and its derivatives. These complexes were obtained by mixing aqueous solutions of the corresponding metal salts with the ligand dissolved in DMSO and aqueous NaOH, using a metal-to-ligand ratio of 1:4:2. The structures of the new compounds were analyzed by melting point determination, microwave plasma atomic emission spectrometry (MP-AES) for Cu and Au, inductively coupled plasma optical emission spectrometry (ICP-OES) for S, atten

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Rashad, Alaa Adnan, Dina A. Najeeb, Shaymaa M. Mahmoud, et al. "Optical and surface properties of Schiff base ligands and Cu(II) and Co(II) complexes." Fine Chemical Technologies 19, no. 5 (2024): 452–61. http://dx.doi.org/10.32362/2410-6593-2024-19-5-452-461.

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Objectives. To study the transition of electrons in 1,2-phenyl(4’-carboxy)benzylidene Schiff base ligand and transition metal ions, optical properties, as well as the surface chemistry of supported transition metals using diffuse reflectance spectroscopy (DRS); to study the roughness and morphology of the Schiff base ligand and its complexes using atomic force microscopy (AFM).Methods. DRS, AFM, and Fourier-transform infrared spectroscopy instruments were used to identify electron transitions, optical properties, and surface morphology in Schiff base ligands and their complexes.Results. The DR

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A., Padmaja, Laxmi K., and Sarala Devi Ch. "Spectro-analytical studies on (E)-N' -(2-hydroxybenzylidene) benzohydrazide and its interaction with CuII." J. Indian Chem. Soc. Vol. 88, Feb 2011 (2011): 183–87. https://doi.org/10.5281/zenodo.5763425.

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Department of Chemistry, Nizam College, Osmania University, Basheerbagh, Hyderabad-500 091, India <em>E-mail</em> : dr_saraladevich@yahoo.com Fax : 91-040-23240806 Department of Chemistry, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad-500 075, India <em>E-mail</em> : katta_laxmi2000@yahoo.co.in <em>Manuscript received 19 February 2010, revised 21 May 2010, accepted 03 June 2010</em> The ligand (E)-<em>N</em>' -(2-hydroxybenzylidene)benzohydrazide formed a green coloured complex with Cu<sup>ll</sup> metal. The composition of complex was determined spectrophotometrically, b

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Lim, Hyunjung, and Sudhansu K. Dey. "Minireview: A Novel Pathway of Prostacyclin Signaling—Hanging Out with Nuclear Receptors." Endocrinology 143, no. 9 (2002): 3207–10. http://dx.doi.org/10.1210/en.2002-220159.

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Abstract Prostacylin (PGI2), one of the major prostaglandins, is derived from arachidonic acid by the action of the cyclooxygenase (COX) system coupled to PGI2 synthase (PGIS). The presence of the COX-2/PGIS at the nuclear and endoplasmic reticular membrane suggests differential signaling pathways of PGI2 actions involving both cell surface and nuclear receptors. Although the signaling of PGI2 via its cell surface receptor, prostacyclin receptor (IP), is well documented in vascular biology, its action via nuclear receptors in other physiological responses is gradually being more appreciated. P

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Singhal, Preeti, Renuka Jain, and Deepti Goyal. "ELECTRONIC SPECTRAL CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF LANTHANIDE (III) - CEFTAZIDIME COMPLEXES." International Journal of Engineering Technologies and Management Research 5, no. 2 (2020): 57–65. http://dx.doi.org/10.29121/ijetmr.v5.i2.2018.146.

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The present work describes the spectrochemical study of some Lanthanide (III) - ceftazidime (Ln(III)-CEFZ) complexes. The impact of the ligand environment on electronic spectrum of the lantanide ion with special reference to complexation and nature of Ln-ligand bond has been examined. The energy and intensity parameters for the complexes have also been evaluated. The ligand and all prepared complexes were screened for their antibacterial activities against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus and the results showed that antibacterial activity of ligand on complexa

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Petrushevski, Vladimir M., Kende Attila Béres, Petra Bombicz, Attila Farkas, László Kótai, and Laura Bereczki. "Structural and Raman spectroscopic characterization of tetrapyridinesilver(I) perrhenate, [Agpy4]ReO4." Macedonian Journal of Chemistry and Chemical Engineering 41, no. 1 (2022): 37–46. http://dx.doi.org/10.20450/mjcce.2022.2490.

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Tetrapyridinesilver(I) perrhenate [Agpy4]ReO4 was synthesized, and its crystal structure and Raman spectra were elucidated at low temperatures. The crystal lattice is constructed from isolated tetrahedral cations and anions having no argentophilic interactions. Weak hydrogen bonds are formed between the oxygens of the disordered perrhenate anions and the ortho-hydrogens of the pyridine ligands. No parallel π…π stacking interactions are observed, but C-H…π interactions of the pyridine ligands within columns of cations and between the columns appeared. Correlation analysis for Ag+, pyridine liga

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