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11.
M. E. Kompan V. P. Kuznetsov V. V. Rozanov A. V. Yakubovich 《Physics of the Solid State》2004,46(6):1110-1112
The size of an ionistor capacitor structure is found to change during its charging and discharging. The specific feature of this effect that distinguishes it from other known effects of changing sizes under electric and magnetic fields (the piezoelectric effect and striction) is the complete hysteresis; i.e., the size reached under the exposure remains unchanged after the field is turned off. 相似文献
12.
V. V. Kuznetsov Yu. V. Ermolenko A. Ya. Zheltov K. A. Kornev S. V. Sheremet'ev 《Journal of Analytical Chemistry》2004,59(1):17-22
The coprecipitation of azo compounds based on 4-nitrophenyl- and 4-sulfophenyldiazonium naphthol sulfonates as their diphenylguanidinium ion-pair complexes with analogous compounds of naphthalene-2-sulfonic acid and 4-phenylsulfodiazonium is investigated. The optimization of the coprecipitation is considered based on the notions of the driving force of the cocrystallization of impurities. The optical characteristics of colored ion-pair complexes are measured. It is found that the water solubility is decreased most substantially for azosulfonates with hydrophobic nitro groups and with no more than two sulfo groups in different aromatic nuclei, which can lead to a decrease in the detection limit due to preconcentration by coprecipitation, which stimulates the thermodynamic flux of concentrate elution. Coprecipitation is combined with flow-injection analysis in the on-line mode, and new procedures are developed for determining naphthol sulfonates and related azo compounds with the detection limit equal to 0.003–0.006 mg/50 mL. 相似文献
13.
V. M. Novotortsev S. A. Varnavskii S. F. Marenkin L. I. Koroleva R. V. Demin V. M. Trukhan S. O. Klimonskii V. D. Kuznetsov 《Russian Journal of Inorganic Chemistry》2006,51(8):1153-1156
Solid solutions Cd1?x MnxGeP2 (x=0?0.19) have been synthesized and identified. In these solutions, the unit cell parameters decrease with an increase in the manganese content. The solid solution Cd0.81Mn0.19GeP2 is a ferromagnet with the Curie temperature T C ≈ 311 K. The paramagnetic moment of Mn2+ ions equal to 5.8 μB, as well as the spontaneous magnetization constituting 76% of the total magnetization of a crystal, has been determined with the use of the Langevin function. The origin of ferromagnetism in CdGeP2:Mn is exchange mediated by charge carriers (holes). These holes are caused by cationic defects in the structure of chalcopyrite. 相似文献
14.
15.
Kuznetsov V. V. Kutepov S. A. Makhova N. N. Lyssenko K. A. Dmitriev D. E. 《Russian Chemical Bulletin》2003,52(3):665-673
A new method was developed for the synthesis of 6-substituted 1,5-diazabicyclo[3.1.0]hexanes and 7-substituted 1,6-diazabicyclo[4.1.0]heptanes by condensation of N-monohalotrimethylene- and N-monohalotetramethylenediamines with carbonyl compounds in the presence of bases. X-ray diffraction studies and quantum-chemical B3LYP/6-31G* calculations demonstrated that the conformations of the resulting bicyclic systems are stabilized by stereoelectronic interactions. As a result, a boat conformation prevails in 1,5-diazabicyclo[3.1.0]hexanes, whereas the energies of chair, half-chair, and boat conformations of 1,6-diazabicyclo[4.1.0]heptanes are equalized. 相似文献
16.
M. G. Voronkov V. I. Rakhlin S. N. Adamovich L. P. Petukhov R. G. Mirskov N. K. Yarosh A. L. Kuznetsov M. V. Sigalov 《Russian Chemical Bulletin》1986,35(4):819-821
Conclusions 1-Hydrosilatrane does not react with monosubstituted ethylenes (or acetylenes) either in the presence of platinum or rhodium complexes or upon initiation of the reactions using organic peroxides, UV irradiation, or thermal methods. By contrast, 2-methyl-6-ethyl-1,3-dioxa-6-aza-2-silacyclooctane readily takes part in hydrosilylation of the indicated unsaturated compounds when Rhacac (CO)2 is present.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khirnicheskaya, No. 4, pp. 899–901, April, 1986. 相似文献
17.
N. G. Zharova É. D. German A. M. Kuznetsov I. O. Shapiro 《Russian Chemical Bulletin》1989,38(2):270-276
1. | The influence of the components of the effect of the structural reorganization of the anionic fragments of monalkylbenzenes and nitroalkanes on the kinetics of their ionization was determined. |
2. | A model of the mechanism of the elementary act in the ionization of monoalkylbenzenes and nitroalkanes in a polar medium, which takes into account the effects of the reorganization of the solvent, the geometric structure of the reactants, and the redistribution of the electron density in them, has been proposed. |
18.
V. V. Kuznetsov A. Pal'ma A. é. Aliev M. Fernandes N. S. Prostakov A. V. Varlamov 《Chemistry of Heterocyclic Compounds》1993,29(6):671-675
The cydization of 1-allyl-1-arylaminocyclohexanes under conditions of acid catalysis afforded 1,2,3,4-tetrahydro-4-methylspiro [quinoline-2-cyclohexanes] methyl (methoxy)-substituted in the phenylene ring. Their mono- and dinitro derivatives were synthesized, and their structure was established. Propositions on the direction of the nitration reaction of these heterocyclic compounds were expressed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 784–788, June, 1993. 相似文献
19.
V. D. Orlov N. V. Getmanskii O. V. Shishkin E. E. Lakin V. P. Kuznetsov 《Chemistry of Heterocyclic Compounds》1993,29(3):301-306
By the reaction of 2-nitrochalcone with hydrazine hydrate, 5-(2-nitrophenyl)-3-phenyl-1H-2-pyrazoline (I) and the hydrazone of 3-(5-(2-nitrophenyl)-3-phenyl-2-pyrazolin-1-yl)-3-(2-nitrophenyl)propiophenol (II) have been prepared. The acylation of both compounds I and II leads to N-acyl derivatives of the first. The acylating ability of formamide and N,N-dimethylformamide was observed in reactions with pyrazoline I. An x-ray structural study was carried out on compound II.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 360–366, March, 1993. 相似文献
20.