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21.
V. G. Vlasenko A. I. Uraev Ya. V. Zubavichus A. A. Chernyshov A. D. Garnovskii R. K. Mamin 《Bulletin of the Russian Academy of Sciences: Physics》2008,72(4):468-470
A series of copper metallochelates C22H18CuN4O2 X (X = Se, S, O) as models of active centers of natural metalloproteins have been synthesized on the basis of new azomethine ligand systems. The structure of the complexes has been studied by extended X-ray absorption fine-structure spectroscopy. It is shown that, in the metallochelates with X = Se or S, one azomethine chalcogen-containing ligand undergoes tridentate interaction with copper ions, while the other ligand is an acetate group. As a result, a complex with the N2O2 X environment is formed, where one of the oxygen atoms of the acetate group is at a large distance from the metal ion: R = 2.56–2.68 Å. For the metallochelate with X = O, coordination of the acetate group by a copper ion is found to be absent, and only interaction with azomethine ligands having average Cu-N/O distances R = 1.96–2.04 Å is observed. 相似文献
22.
A.?S.?BurlovEmail author S.?A.?Mashchenko V.?G.?Vlasenko S.?A.?Nikolaevskii M.?A.?Kiskin Ya.?V.?Zubavichus A.?I.?Uraev D.?A.?Garnovskii E.?V.?Korshunova S.?I.?Levchenkov 《Russian Journal of General Chemistry》2018,88(2):262-270
Novel Cu(II), Co(II), Ni(II), and Zn(II) complexes of 5-methyl-2-phenyl-4-[(4-phenylazo)anilinemethylylidene]- 2,4-dihydro-3H-pyrazole-3-thione and 5-methyl-4-[4-methyl-2-(4-methylphenylazo)anilinemethylylidene]- 2-phenyl-2,4-dihydro-3H-pyrazole-3-thione, i.e. ligands containing the phenylazo group in the ortho and para positions of the aniline fragment, were synthesized by the chemical and electrochemical methods. The complexes and ligands were characterized by IR, 1H NMR, X-ray absorption spectroscopy and magnetochemistry. The azo group of the ligands is not involved in coordination to the metal. 相似文献
23.
A. S. Burlov V. N. Ikorskii S. A. Nikolaevskii Yu. V. Koshchienko V. G. Vlasenko Ya. V. Zubavichus A. I. Uraev I. S. Vasil’chenko D. A. Garnovskii G. S. Borodkin A. D. Garnovskii 《Russian Journal of Inorganic Chemistry》2008,53(10):1566-1572
Tridentate azomethine ligands with N2O4 and N3donor atoms and their copper complexes were synthesized and characterized. The dimeric structure of copper(II) chelates was confirmed by EXAFS studies. Complexes based on 2-tosylaminobenzaldehyde azomethines tend to undergo ferromagnetic exchange, whereas similar salicylaldehyde derivatives have antiferromagnetic exchange. 相似文献
24.
A. S. Burlov A. I. Uraev V. N. Ikorskii S. A. Nikolaevskii Yu. V. Koshchienko I. S. Vasil’chenko D. A. Garnovskii V. G. Vlasenko Ya. V. Zubavichus L. N. Divaeva G. S. Borodkin A. D. Garnovskii 《Russian Journal of General Chemistry》2008,78(6):1230-1235
Copper chelates with tridentate ligands containing pyridine or pyrazole ring at the azomethine or azo fragment were synthesized by chemical electrochemical methods, and their structure was characterized by the EXAFS spectra. Thermal magnetochemical analysis of the complexes revealed antiferromagnetic exchange interaction in all complexes. The exchange interaction parameter of the complex containing an N-tosylamino group in the ortho position with respect to the azomethine group is much lesser than that of the corresponding complex having an oxygen atom in the same position. The copper chelate derived from azopyrazole ligand shows low-temperature ferromagnetic phase transition. 相似文献
25.
A. S. Burlov Yu. V. Koshchienko V. G. Vlasenko V. V. Chesnokov Yu. V. Revinskii Ya. V. Zubavichus A. L. Trigub D. A. Garnovskii A. I. Uraev 《Russian Journal of General Chemistry》2016,86(10):2379-2384
Molecular complexes of bis(4-formyl-3-methyl-1-phenyl-1H-pyrazol-5-olato)cadmium(II) with isoquinolin-1-amine, quinolin-3-amine, 4,6-dimethylquinolin-5-amine, and quinolin-6-amine have been synthesized, and their structure was studied by IR, UV, 1H NMR, and X-ray absorption spectroscopy. Photoluminescence properties of the complexes have also been examined. 相似文献
26.
27.
A. I. Uraev A. L. Nivorozhkin G. I. Bondarenko K. A. Lysenko O. Yu. Korshunov V. G. Vlasenko A. T. Shuvaev V. P. Kurbatov M. Yu. Antipin A. D. Garnovskii 《Russian Chemical Bulletin》2000,49(11):1863-1868
Copper(II) chelates of composition CuL2 were synthesized based on 4-aminomethylene derivatives of 5-thiopyrazoles (LH). The complexes were studied by UV, IR, ESR,
and EXAFS spectroscopy, magnetochemistry, and X-ray diffraction analysis. The coordination polyhedra in the complexes are
pseudotetrahedra or octahedra of the types CuN2S2 or CuN4S2, respectively, which are distorted due to the Jahn—Teller effect. The UV and ESR spectra of copper chelates with a six-coordinate
metallocycle formed by the N and S atoms of the azomethine ligand and the nitrogen atom of the quinoline substituent (R) of
the C=N−R fragment are most similar to the spectra observed for metals involved in the active centers of natural metalloenzymes
(“blue” copper proteins).
Published inIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1891–1896, November, 2000. 相似文献
28.
29.
A. V. Metelitsa A. S. Burlov S. O. Bezuglyi I. G. Borodkina V. A. Bren A. D. Garnovskii V. I. Minkin 《Russian Journal of Coordination Chemistry》2006,32(12):858-868
Data on luminescent complexes with azomethine ligands are generalized and systematized. The synthesis and luminescent properties of complexes with acyclic and cyclic azomethines are considered. 相似文献
30.