排序方式: 共有27条查询结果,搜索用时 31 毫秒
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Krinochkin A. P. Shabunina O. V. Savchuk M. I. Kudryashova E. A. Rybakova S. S. Ladin E. D. Kopchuk D. S. Zyryanov G. V. Chupakhin O. N. 《Russian Journal of Organic Chemistry》2022,58(6):917-919
Russian Journal of Organic Chemistry - An efficient synthetic approach to 3-(4-carboxyphenyl)pyridine-2,6-dicarboxylic acid has been developed on the basis of “1,2,4-triazine”... 相似文献
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T. G. Aminov G. G. Shabunina E. V. Busheva V. M. Novotortsev 《Russian Journal of Inorganic Chemistry》2017,62(3):361-371
Temperature-dependent magnetization was measured for CuCr2–x Sb x Sе4 solid solutions in the range 300–5 K in a weak field (50 Oe) and a strong field (10 kOe) and in an ac magnetic field having a frequency of 100–10000 Hz and an amplitude of Н = 1 Oe. The type and character of magnetic transitions under investigation in the system were determined, and its magnetic phase diagram was constructed. 相似文献
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T. G. Aminov E. V. Busheva G. G. Shabunina V. M. Novotortsev 《Russian Journal of Inorganic Chemistry》2018,63(4):519-529
The magnetic phase diagram of solid solutions in the CoCr2S4–Cu0.5Ga0.5Cr2S4 system was constructed. The widest concentration range (0.38 < x < 1) in the diagram represents solid solutions based on the ferrimagnetic semiconductor CoCr2S4 (TC = 223 K), which exhibits unusual properties in the magnetic ordering region while measuring the temperature dependence of the dynamic susceptibility. The magnetic properties were studied with a Quantum Design PPMS-9 platform within the temperature range 5–300 K in a 100-Oe constant magnetic field and/or a varying (100-, 500-, and 1000-Hz) magnetic field with an amplitude of 1 Oe. 相似文献
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Shabunina O. V. Krinochkin A. P. Kopchuk D. S. Zyryanov G. V. Rusinov V. L. Chupakhin O. N. 《Russian Journal of Organic Chemistry》2018,54(5):812-814
Russian Journal of Organic Chemistry - Convenient one-pot method was developed for the preparation of 5-alkyl-3-(2-pyridyl)-, 5-alkyl-3-(4-pyridyl)- or 5-alkyl-3-(quinolin-2-yl)-1,2,4-triazines in... 相似文献
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Valery N. Kozhevnikov Dmitry N. Kozhevnikov Olga V. Shabunina Vladimir L. Rusinov Oleg N. Chupakhin 《Tetrahedron letters》2005,46(11):1791-1793
A new route to substituted bipyridines based on a new method for the synthesis of substituted 3-pyridyl-1,2,4-triazines and their aza-Diels-Alder reactions is shown to be an efficient strategy for the preparation of structurally diverse bipyridine ligands. 相似文献
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A. D. Balaev V. A. Gavrichkov S. G. Ovchinnikov V. K. Chernov T. G. Aminov G. G. Shabunina 《Journal of Experimental and Theoretical Physics》1998,86(5):1026-1029
In the magnetic field range ΔH=8–60 kOe we observed and studied the anomalous oscillations in the magnetic field dependence of the resistance and magnetization
of single crystals of n-HgCr2Se4. The absence of periodicity in 1/H in the ΔH=8–20 kOe range can be explained by the non-Fermi-liquid behavior of the electron subsystem and agrees with the theory of
the de Haas-van Alphen in systems with intermediate valence. In stronger fields, ΔH=20–60 kOe, the amplitude of the fundamental harmonic decreases, with the number and amplitude of the higher-order harmonics
increasing. As a result, noise is superimposed on the signal as magnetic field strength grows. The temperature dependence
of the magnetization is the sum of the monotonic spin-wave contribution and the oscillating part.
Zh. éksp. Teor. Fiz. 113, 1877–1882 (May 1998) 相似文献
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T. G. Aminov N. N. Efimov G. G. Shabunina D. I. Kirdyankin 《Bulletin of the Russian Academy of Sciences: Physics》2014,78(2):115-118
Measurements of the magnetic characteristics of Cu1 ? x In1 ? x Fe2x Se2 solid solutions and their approximation by Langevin and Curie equations show that the properties observed in samples are the result of antiferromagnetic clusters in which magnetic moments fall to ~0.8 μB/atom as x rises, confirming that the antiferromagnetic interaction in the samples grows stronger. 相似文献
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Dmitry N. Kozhevnikov Olga V. Shabunina Pavel A. Slepukhin 《Tetrahedron letters》2006,47(39):7025-7029
Readily available 5-aryl-2,2′-bipyridines and their derivatives are a unique family of fine-tunable chromophores, where changes in the substitution patterns, solvation and coordination are translated into dramatic spectral changes. They exhibit sensitive and selective response to zinc ions with dramatic increases in emission intensity or significant red-shifts of emission maxima. 相似文献
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G. G. Shabunina E. V. Busheva T. G. Aminov 《Russian Journal of Inorganic Chemistry》2006,51(1):126-130
The interaction along the Cu2GeSe3-Cr2Se3 join has been investigated using differential thermal and X-ray powder diffraction analyses. It has been found that the join is quasi-binary with a degenerate eutectic based on the Cu2GeSe3 compound. Two new quaternary compounds have been found along the join, namely, Cu2GeCr6Se12 and the γ phase. The phase is formed at 915°C by the peritectic reaction L + β-Cr2Se3 = γ and has the primary crystallization region up to 9 mol % Cr2Se3 in the temperature range 758–915°C. The room-temperature homogeneity range of the γ phase is 65–70 mol % Cr2Se3. The Cu2GeCr6Se12 compound is formed by the peritectoid reaction γ + β-Cr2Se3=Cu2GeCr6Se12 at 880°C, and its homogeneity range is 73–79 mol %. The X-ray reflections of the γ phase are indexed for the tetragonal crystal system with the unit cell parameters a = 12.043 Å and c = 9.180 Å. Samples with ferromagnetic properties are found in the homogeneity regions of both compounds. 相似文献