排序方式: 共有29条查询结果,搜索用时 125 毫秒
21.
Dr. Anastasia I. Solomatina Dr. Ekaterina E. Galenko Daria O. Kozina Alexey A. Kalinichev Dr. Vadim A. Baigildin Natalia A. Prudovskaya Dr. Julia R. Shakirova Dr. Alexander F. Khlebnikov Dr. Vitaly V. Porsev Dr. Robert A. Evarestov Dr. Sergey P. Tunik 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(64):e202202207
Five square-planar [Pt(C^N*N′^C′)] complexes ( Pt1 – Pt5 ) with novel nonsymmetric tetradentate ligands ( L1 – L5 ) were synthesized and characterized. Varying the structure of the metalating aromatic systems result in substantial changes in photophysical properties and intermolecular interaction mode of the complexes in solution and in solid state. The complexes are strongly emissive in tetrahydrofuran solution, with the band maxima ranging from 560 to 690 nm. Three of these complexes ( Pt1 , Pt2 , Pt4 ) afford nanospecies upon injection of their solution into water, which show aggregation-induced emission (AIE) with a strong red shift of emission bands. In the solid state, crystalline samples of these complexes demonstrate mechanochromism upon grinding with a bathochromic shift of the emission. DFT and TD-DFT computational analysis of monomeric Pt1 – Pt5 in solution and model dimeric emitters formed through intermolecular interaction of Pt1 , Pt2 , Pt4 molecules allowed assignment of observed AIE to the 3MMLCT excited states of Pt-Pt bonded aggregates of these complexes. 相似文献
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A. V. Galenko S. I. Selivanov P. S. Lobanov A. A. Potekhin 《Chemistry of Heterocyclic Compounds》2007,43(9):1124-1130
Rearrangement and cyclization of O-vinyl-α-(aminocarbonyl)acetamidoximes gives two isomeric 2-aminopyrroles and/or 2-pyrrolinones
and this depends on the rearrangement route.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1328–1334, September, 2007. 相似文献
25.
V. V. Tkachev O. A. Raevskii N. V. Luk'yanov G. I. Van'kin R. I. Yurchenko V. G. Yurchenko A. F. Solotnov A. M. Pinchuk T. G. Galenko T. A. Ivanova L. O. Atovmyan 《Russian Chemical Bulletin》1992,41(12):2211-2216
The antihypoxic and anticonvulsant activity of eight new amidophosphoryl derivatives of crown ethers was investigated. It was found that some of them exhibit pronounced antihypoxic activity. The results of an x-ray structural and IR spectroscopic study of dibenzo-N-phenylphosphonyl-14-crown-5 (a=9.818,b=16.062,c=15.925 Å; =124.90°;V=2072 Å3;M=417.2;d=1.33 g/cm3 forZ=4, 1955 independent reflections [I>3(I)] in a DAR-UM inCuK
radiation,P2
1/b space group,R=5.2%) and dibenzo-N-adamantylphosphonyl-14-crown-5 compounds (a=11.077,b=15.936,c=16.771 Å; =56.05°;V=2456 Å3;M=486.3;d=1.31 g/cm3 forZ=4, 2164 independent reflections [I>3(I)] in a DAR-UM inCuK
radiation,P21/b space group,R=5.1%) are reported. Some details of the structure of the dibenzo-N-phenylphosphonyl-14-crown-5-complex with calcium thiocyanate and water are discussed; a polyhedron with a coordination number of six was found for the first time for calcium complexes with macrocyclic ligands. The combined examination of the results of the biological, x-ray structural, and IR spectroscopic study of macrocyclic, 14-member ligands suggested that the nature of the substituents at phosphorus affect the conformational state of the macrocycle, which remains unchanged in complexation in the investigated conditions.Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences, 142432 Chernogolovka. Institute of Physiologically Active Substances, Russian Academy of Sciences, 142432 Chernogolovka. Institute of Organic Chemistry, Ukrainian Academy of Sciences, 252660 Kiev. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 12, pp. 2784–2790, December, 1992. 相似文献
26.
We consider the modification of the Cahn-Hilliard equation when a time delay process through a memory function is taken into
account. The memory effects are seen to affect the dynamics of phase transition at short times. The process of fast spinodal
decomposition associated with a conserved order parameter - concentration is studied numerically. Details of a semi-implicit
numerical scheme used to simulate the kinetics of spinodal decomposition and evolution of the structure factor are discussed.
Analysis of the modeled structure factor predicted by a hyperbolic model of spinodal decomposition is presented in comparison
with the parabolic model of Cahn and Hilliard. It is shown that during initial periods of decomposition the structure factor
exhibits wave behavior. Analytical treatments explain such behavior by existence of damped oscillations in structure factor
at earliest stages of phase separation and at large values of the wave-number. These oscillations disappear gradually in time
and the hyperbolic evolution approaches the pure dissipative parabolic evolution of spinodal decomposition. 相似文献
27.
A model has been presented for the physical decay with the relaxation of the diffusion flux described by the hyperbolic diffusion equation. The analysis of such a hyperbolic model provides the predictions for the critical parameters of the decay, which are compared with the conclusions of the Cahn-Hilliard theory. It has been shown that the hyperbolic model predicts the nonlinearity of the dispersion curve for the spinodal decay, which is controlled by the ratio of the diffusion and correlation lengths. The predicted behavior of the dispersion curve is compared with the experimental data on phase separation in binary glasses. 相似文献
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Technical Physics - The process of impurity redistribution in the vicinity of diffuse interface between the liquid and solid phases has been investigated by numerical simulation of nonstationary... 相似文献
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P. K. Galenko M. D. Krivilev B. I. Lad’yanov M. V. Osetrov 《Crystallography Reports》2001,46(2):310-311
Solidification of a binary alloy rapidly quenched by spinning [1] has been studied by mathematical simulation. 相似文献