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1.
L. I. Bryukvina E. A. Ermolaeva S. N. Pidgurskiĭ L. F. Suvorova V. M. Khulugurov 《Physics of the Solid State》2006,48(1):68-72
It was detected for the first time that films consisting of a transition-metal-based structure form (via thermal diffusion
of intracrystalline impurities) on the surface of alkali-halide (LiF, NaF) crystals activated by transition metals Co, Ni,
or Mn. The thickness, density, and composition of the films are shown to be different, depending on the heat treatment conditions.
The crystals were annealed at temperatures varying from 473 to 1073 K in vacuum and air. The surface structures forming upon
annealing in vacuum exhibit magnetic properties. The films were studied by optical, x-ray fluorescence, and electron spectroscopy
to reveal the mechanisms of transition-metal film formation during thermal annealing. 相似文献
2.
A. N. Titov O. N. Suvorova S. Yu. Ketkov S. G. Titova A. I. Merentsov 《Physics of the Solid State》2006,48(8):1466-1471
Single crystals and polycrystals of titanium diselenide TiSe2 intercalated with ferrocene Fe(η5-C5H5)2 and cobaltocene Co(η5-C5H5)2 are synthesized. The magnetic susceptibility and electrical resistivity of the intercalation compounds are measured. The results obtained demonstrate that the intercalation brings about the formation of an impurity band with a temperature-dependent width. 相似文献
3.
Suvorova V. V. Panicheva L. P. Mamontova Yu. V. Belyatskii M. K. 《Russian Journal of Organic Chemistry》2003,39(7):957-962
Selective dehydrobromination of 1,2-dibromo-1-phenylethane to -bromostyrene was effected under conditions of phase-transfer catalysis in systems containing KOH, toluene, and tetraalkylammonium bromides. The high selectivity of the catalytic systems originates from stabilization by lipophilic cation of the phase-transfer catalyst of a E1cb-like transition state in the E2 mechanism. In the presence of a catalytic amount of lipophilic alcohols, phenylacetylene was obtained. Substrate activation by alcohol molecules is explained by enhancement of the acceptor power of halogen atoms due to solvation and by increased mobility of hydrogen atoms. 相似文献
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B. A. Tertov Yu. G. Bogachev Yu. V. Koshchienko G. M. Suvorova E. B. Tsupak N. K. Chub S. F. Breus 《Chemistry of Heterocyclic Compounds》1986,22(8):868-872
Organolithium and organosodium compounds of 1,2-dimethyl-, 1-methyl-2-ethyl-, 1-methyl-2-propyl-, and 1-phenyl-2-methylbenzimidazole, containing the metal in the alkyl group at position C(2), were obtained by metallation. It was found that metallation can be complicated by the addition of the metalling reagent at the C=N bond of the heterocycle. It was shown that the obtained organometallic compounds can be used for the synthesis of various derivatives of benzimidazole.The calculation was performed with the standard bond lengths. A planar model was used for the carbanion.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1073–1077, August, 1986. 相似文献
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EV Tretyakov SE Tolstikov AO Suvorova AV Polushkin GV Romanenko AS Bogomyakov SL Veber MV Fedin DV Stass E Reijerse W Lubitz EM Zueva VI Ovcharenko 《Inorganic chemistry》2012,51(17):9385-9394
Breathing crystals based on polymer-chain complexes of Cu(hfac)(2) with nitroxides exhibit thermally and light-induced magnetostructural anomalies in many aspects similar to a spin crossover. In the present work, we report the synthesis and investigation of a new family of Cu(hfac)(2) complexes with tert-butylpyrazolylnitroxides and their nonradical structural analogues. The complexes with paramagnetic ligands clearly exhibit structural rearrangements in the copper(II) coordination units and accompanying magnetic phenomena characteristic for breathing crystals. Contrary to that, their structural analogues with diamagnetic ligands do not undergo rearrangements in the copper(II) coordination environments. This confirms experimentally the crucial role of paramagnetic ligands and exchange interactions between them and copper(II) ions for the origin of magnetostructural anomalies in this family of molecular magnets. 相似文献
9.
A. D. Avrorin A. V. Avrorin V. M. Aynutdinov R. Bannash I. A. Belolaptikov D. Yu. Bogorodsky V. B. Brudanin N. M. Budnev A. R. Gafarov O. N. Gaponenko K. V. Golubkov T. I. Gress I. A. Danilchenko Zh. -A. M. Dzhilkibaev G. V. Domogatsky A. A. Doroshenko A. N. Dyachok V. A. Zhukov A. V. Zagorodnikov V. L. Zurbanov K. G. Kebkal O. G. Kebkal A. V. Kozhin K. V. Konischev A. V. Korobchenko F. K. Koshel A. P. Koshechkin V. F. Kulepov D. A. Kuleshov V. I. Ljashuk M. B. Milenin R. A. Mirgazov E. R. Osipova A. I. Panfilov L. V. Pan’kov E. N. Pliskovsky M. I. Rozanov E. V. Rjabov A. V. Skurihin A. A. Smagina O. V. Suvorova V. A. Tabolenko B. A. Tarashansky S. V. Fialkovsky Z. Honz B. A. Shaybonov A. A. Sheifler M. D. Shelepov S. A. Yakovlev 《Physics of Particles and Nuclei Letters》2016,13(6):737-746
In April 2015, the first cluster of Baikal-GVD was deployed in Lake Baikal and put into operation. It comprises eight strings. Each string consists of 24 optical modules. An optical module is a detection element of Baikal-GVD; it includes a Hamamatsu R7081-100 photomultiplier tube with a high quantum sensitivity. We describe the design of the optical module, the front-end electronics, and the laboratory characterization and calibration. 相似文献
10.
O. V. Suvorova 《Physics of Atomic Nuclei》2011,74(1):122-129
The status of neutrino experiments in connection with the fundamental problem of searches for a signal from dark matter is
discussed. Limits on the magnitude of the effect of dark-matter-particle annihilation in the Sun that were obtained with neutrino
telescopes are presented. In particular, the first results from the NT-200 Baikal Deep Underwater Neutrino Telescope are described. 相似文献