Copper(II) complexes based on 2-thenoyltrifluoroacetone aroyl hydrazones: Synthesis, spectroscopy, and X-ray diffraction analysis

Avezov, K. G.; Umarov, B. B.; Tursunov, M. A.; Минин, В. В.; Парпиев, Н. А.

doi:10.1134/s1070328416070010

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…The EPR parameters for the Cu- [I-Cu] 6 hexamer with tyrazine fragments (L1), had the following values: g = 2.119, a cu = 89.6 E, α 2 = 0.81, whereas for the oligomer with aminoresorcinol ligands, these values were within the following range: g = 2.108, a Cu = 95.84 E, α 2 = 0.89. The αparameter calculated from the isotropic EPR parameters using Formula (2) [ 48 ]:

characterizes the degree of covalence of the copper-ligand bond. If the oligomer based on II had α 2 = 0.89, then the oligomer based on I was somewhat lower (0.81).…”

Section: Resultsmentioning

confidence: 99%

New Polyporphyrin Arrays with Controlled Fluorescence Obtained by Diaxial Sn(IV)-Porphyrin Phenolates Chelation with Cu2+ Cation

et al. 2021

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New coordination oligomers and polymers of Sn(IV)-tetra(4-sulfonatophenyl)porphyrin have been constructed by the chelation reaction of its diaxialphenolates with Cu2+. The structure and properties of the synthesized polyporphyrin arrays were investigated by 1H Nuclear Magnetic Resonance (1H NMR), Infra Red (IR), Ultra Violet - Visible (UV-Vis) and fluorescence spectroscopy, mass spectrometry, Powder X-Rays Diffraction (PXRD), Electron Paramagnetic Resonance (EPR), thermal gravimetric, elemental analysis, and quantum chemical calculations. The results show that the diaxial coordination of bidentate organic ligands (L-tyrazine and diaminohydroquinone) leads to the quenching of the tetrapyrrole chromophore fluorescence, while the chelation of the porphyrinate diaxial complexes with Cu2+ is accompanied by an increase in the fluorescence in the organo-inorganic hybrid polymers formed. The obtained results are of particular interest to those involved in creating new ‘chemo-responsive’ (i.e., selectively interacting with other chemical species as receptors, sensors, or photocatalysts) materials, the optoelectronic properties of which can be controlled by varying the number and connection type of monomeric fragments in the polyporphyrin arrays.

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characterizes the degree of covalence of the copper-ligand bond. If the oligomer based on II had α 2 = 0.89, then the oligomer based on I was somewhat lower (0.81).…”

Section: Resultsmentioning

confidence: 99%

New Polyporphyrin Arrays with Controlled Fluorescence Obtained by Diaxial Sn(IV)-Porphyrin Phenolates Chelation with Cu2+ Cation

et al. 2021

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“…The interaction of glutamic acid with the selected substances was studied using the classical isothermal solubility method [10][11][12]. As practice has shown, this method of studying ternary systems is the simplest, most convenient, and provides reliability and reproducibility of the obtained data, especially when isolating new double and complex compounds, hydrate forms, and phases of variable composition in solid solutions.…”

Section: Methodsmentioning

confidence: 99%

Equilibrium of the solubility isotherm in systems Cobalt(II) chloride-glutamic acid-water

Aliev,

Ernazarov,

Khusenov

et al. 2024

E3S Web of Conf.

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The study is focused on the interaction between glutamic acid and hexavodic cobalt chloride. The solubility curve, influenced by the high solubility of the initial components, extends horizontally along a catheter corresponding to the cobalt chloride content. The secretion of glutamic acid exhibits a gradual increase over a relatively extended period. As the cobalt chloride concentration in the solution reaches 25.04%, a new phase emerges, resulting from the molecular interaction of the reactants, forming a double dihydrous compound comprising one molecule of glutamic acid and cobalt chloride: C5H9NO4∙CoCl2.

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“…These coefficients α and α′ are related to each other by the normalization equation ( 6), where S is the overlap integral. The energy of the isotropic hyperfine interaction of the unpaired electron with the ligand nuclei is expressed by the equation ( 6) [28,29], in this equation γ N -is the gyromagnetic ratio of the nitrogen atom, β о -is the Bohr magneton, β N -is the nuclear magneton, ρ N (0)is the density 2s-orbitals on the nucleus of the nitrogen atom.…”

Section: ħ=G•β•h O •S + <A Cu > I Cu •S + a Nj •I Nj •Smentioning

confidence: 99%

Synthesis and ESR Spectroscopy Complexes of Copper(II) with Acyl- and Aroylhydrazones of Methyl Ester of 5,5-Dimethyl-2,4-Dioxohexanoic Acid

Amonovich¹,

Nematovna²,

Giyasovich³

et al. 2020

AJHC

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The method of ESR is widely used for the investigation of electronic construction and the geometrical structure of the polynuclear complexes of the transition metals. The majority of the well-known experimental works had been done using monocrystals and polycrystalline examples. Construction of mononuclear complexes of the copper(II), the nature of antiferromagnetic exchange interaction, and its value was the object of the discussion by the scientists and that issue is being checked in the article. Complex compounds of copper(II) with 5,5-dimethyl-2,4-dioxohexane acid ((H 2 L 1 -H 2 L 11 ) methyl ether aroylhydrazones were synthesized and studied. The interaction of alcohol solutions of the H 2 L 1 -H 2 L 11 ligands with an aqueous ammonia solution of copper(II) acetate synthesized green fine-crystalline copper(II) complexes. Complexes investigation by the method of ESR spectroscopy, of the studying the magneto chemical properties of copper(II) complexes. If for the complex compound CuL 1 • NH 3 , which has a cyclopentanone ring β-diketone fragment, the EPR parameters have theβa substituent for the α 2 =0.82; value: g=2.099, a Cu =89.53 e, a N =12.81 e, then for CuL 4 • NH 3 with a cyclohexane ring substituent these values are in the range: g=2,101, a Cu =87,48 e, a N =13,02 e, α 2 =0,82.

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Copper(II) complexes based on 2-thenoyltrifluoroacetone aroyl hydrazones: Synthesis, spectroscopy, and X-ray diffraction analysis

Cited by 6 publications

References 5 publications

New Polyporphyrin Arrays with Controlled Fluorescence Obtained by Diaxial Sn(IV)-Porphyrin Phenolates Chelation with Cu2+ Cation

New Polyporphyrin Arrays with Controlled Fluorescence Obtained by Diaxial Sn(IV)-Porphyrin Phenolates Chelation with Cu2+ Cation

Equilibrium of the solubility isotherm in systems Cobalt(II) chloride-glutamic acid-water

Synthesis and ESR Spectroscopy Complexes of Copper(II) with Acyl- and Aroylhydrazones of Methyl Ester of 5,5-Dimethyl-2,4-Dioxohexanoic Acid

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