Mesomorphic azomethine complexes of Iron(III) based on 4,4′-dodecyloxybenzoyloxybenzoyl-4-salicylidene-2-aminopyridine

Груздев, М. С.; Chervonova, U. V.; Zharnikova, N. V.; Kolker, A. M.

doi:10.1080/02678292.2013.820853

Cited by 7 publications

(7 citation statements)

References 20 publications

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“…According to the DSC ( Fig. 7) and ESR [55] data, there are no phase transitions in the range of 270 -360 K in the complexes. However, f(С p ) has maxima at higher temperatures (complex 1at 365, 375 and 410 K, complex 3 -at 375 and 383 K).…”

Section: Magnetothermal Properties In Compounds With Schiff's Basesmentioning

confidence: 89%

“…An experimental study of magnetothermal properties of the obtained complex was carried out in magnetic field from 0 to 1.0 T at a temperature of 293 K. Based on the analysis of the results obtained above, it was supposed that all azomethine iron(III) complexes were capable to display MCE. This hypothesis is based on the Mössbauer spectroscopy data which showed that the iron(III) ion was in a high-spin state at the temperature Т ≥ 80 К; polarization thermal microscopy data which indicated that the complexes had phase transitions; and differential scanning calorimetry data confirming the hypothesis [55,56]. To confirm these hypotheses, we carried out an experimental study of the magnetocaloric effect of the new synthesized complex when the magentic field changed from 0 to 1.0 T at a temperature of 293 K. However, contrary to expectations, we found that when the magnetic field was switched on, the complex did not display any magnetocaloric effect.…”

Section: Nanosystemsmentioning

confidence: 96%

“…Phase transformations of complexes had been earlier studied by the method of polarization thermal microscopy [55]; it was established that all the substances under study displayed mesomorphic properties and were thermotropic liquid crystals. Analysis of the polarization thermal microscopy and microcalorimetry results shows that there is a correlation between magnetic phase transition and thermotropic mesomorphism.…”

Section: Nanosystemsmentioning

confidence: 99%

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Magnetocaloric Effect in Carbon-Containing Compounds

Korolev¹,

Ломова²,

Ramazanova³

2019

RENSIT

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The review is devoted to carbon-containing compounds with magnetic properties. It considers recent developments in the problem of synthesis and studying physico-chemical properties of single-molecule magnets (SMMs). It is shown that single-molecule magnets, such as graphene and its donor-acceptor complexes, metal complexes with Schiff 's bases, paramagnetic high-spin complexes of porphyrins/phthalocyanines, as well as 3D nanoparticles of metal oxides and hybrid composites of magnetic nanoparticles with graphene have a large and even giant magnetocaloric effect at temperatures close to room conditions, i.e. beyond the temperature range of magnetic transitions. For the first time, the behaviour of such molecular materials has been determined by a direct method on an original microcalorimetric apparatus and the first data on the interconnection between the chemical structure of their molecules and magnetothermal properties have been obtained.

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Section: Magnetothermal Properties In Compounds With Schiff's Basesmentioning

confidence: 89%

Section: Nanosystemsmentioning

confidence: 96%

Section: Nanosystemsmentioning

confidence: 99%

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Magnetocaloric Effect in Carbon-Containing Compounds

Korolev¹,

Ломова²,

Ramazanova³

2019

RENSIT

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“…All the complexes were prepared by the same general method (Scheme 1). [25,26] The reaction was carried out in a binary solvent (benzene/ethanol in ratio 1:2) without isolating the ligand from the solution followed by complexation with metal salts (Fe…”

Section: Synthesis Of Complexes 1-4mentioning

confidence: 99%

Schiff base complexes with different metals incorporating derivatives of 3,6‐di‐tert‐butylcarbazole

Груздев

Chervonova

Ksenofontov

et al. 2021

Applied Organom Chemis

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Four new mononuclear complexes formed by the asymmetric azomethine ligand have been synthesized and characterized. Fe (III), Ga (III), Cu (II), and Co (II) ions were used as a central metal ion. The chelating ligand contains derivatives of 3,6-di-tert-butylcarbazole as a chromophor. The data of far FT-IR spectroscopy and mass spectrometry confirmed the formation of HC N bond and the coordination of metal ion through deprotonated oxygen and azomethine nitrogen. The X-ray powder analysis of polycrystalline complexes showed that the crystal cells of all complexes are triclinic, with unit cells containing four molecules each. The counter-ions are regularly embedded into the crystalline lattice. The conformation of the molecules of all complexes is elongated and symmetric. The thermal gravimetric analysis showed a high stability of all complexes above 200 C. The UV-Vis and fluorescence spectral data of the synthesized compounds were obtained in acetone, benzene, dichloromethane, chloroform, DMA, DMF, DMSO, and THF. The complexes show intensive π-π*, n-π*, and charge-transfer (CT) bands in the range from 200 to 400 nm in all solvents, whereas the ligand shows intensive π-π*, n-π* bands only. A strong red shift (21-31 nm) of the emission band maximum of the complexes is observed upon transition from nonpolar to polar solvents.

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“…These results are obtained by applying diffusion agar method [55][56][57]. The antibacterial and antifungal activities were tested using Streptomycin as a reference.…”

Section: Biological Activitymentioning

confidence: 99%

Synthesis, structural characterization, thermal behaviour and antimicrobial activity of copper, cadmium and zinc chelates of traizole-thiole ligand in comparison with theoretical molecular orbital calculations

Zayed

Nouman

2019

Egypt. J. Chem.

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T HIS research involved structural and molecular behaviour of the ligand HL, 4-amino-5-(2,2-dichloro-1-methylcyclopropyl)-4H-1,2,4-triazole-3-thiol toward the transition metal ions namely Cu (II), Cd(II) and Zn (II) had been studied using elemental analyses, magnetic, electronic, FT-IR, 1 H-NMR, XRD and Thermal analyses (TGA and DTA). The interpretation of practical data obtained had been evaluated and confirmed by theoretical molecular modelling. The computations had been done by software of Gaussian 09W package. The geometries of traizole-thiole ligand and its metal chelates were fully optimized using density functional theory B3LYP method. Their structures were confirmed via correlation between experimental and theoretical calculations. The ligand and its metal chelates biological activities had been tested against Gram-positive (Staphylococcus aureus ATTC 12600), Gram-negative (Escherichia coli ATTC 11775 and) bacteria, two fungus (Aspergillus flavus and Candida albicans).

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Mesomorphic azomethine complexes of Iron(III) based on 4,4′-dodecyloxybenzoyloxybenzoyl-4-salicylidene-2-aminopyridine

Cited by 7 publications

References 20 publications

Magnetocaloric Effect in Carbon-Containing Compounds

Magnetocaloric Effect in Carbon-Containing Compounds

Schiff base complexes with different metals incorporating derivatives of 3,6‐di‐tert‐butylcarbazole

Synthesis, structural characterization, thermal behaviour and antimicrobial activity of copper, cadmium and zinc chelates of traizole-thiole ligand in comparison with theoretical molecular orbital calculations

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