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Volodymyr Buturlim Michał Falkowski Mykhaylo Paukov Oleksandra Koloskova Daria Drozdenko Milan Dopita 《哲学杂志》2019,99(15):1881-1898
Uranium Laves phase UTi2 does not exist in a pure form, but can be stabilised by the presence of hydrogen, which can be absorbed in concentration exceeding 5?H atoms/f.u. Low temperature specific heat, magnetic susceptibility, and resistivity indicate that UTi2H5 is a spin fluctuator close to the verge of magnetic ordering. Its susceptibility follows at high temperatures the Curie–Weiss law with U effective moment µeff[ ?= 3.1?µB/U and paramagnetic Curie temperature Θp = ?200 K. The temperature dependence of specific heat exhibits a pronounced and weakly field dependent upturn in Cp/T versus T below 10 K reflecting the effect of spin fluctuations. It can be described by an additional T½ term. The Sommerfeld coefficient γ = 256?mJ/mol K2 classifies the compound as a mid-weight heavy fermion. Spin fluctuations are affecting also electrical and thermal transport and thermoelectric power, which all resemble UAl2. A lattice anomaly at ≈ 240?K, attributed to the melting of hydrogen sublattice, reflects in most of bulk properties. 相似文献
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Magdesieva N. N. Koloskova N. M. Le Ngi Nguyen 《Chemistry of Heterocyclic Compounds》1977,13(11):1177-1180
A preparative method was worked out for the synthesis of 3,4,6-triaryl-2-pyrones by 1,3-dipolar cycloaddition of selenium arylacylmethylides to diphenylcyclopropenone.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1475–1478, November, 1977. 相似文献
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P. A. Konstantinov I. V. Shelepin N. M. Koloskova 《Chemistry of Heterocyclic Compounds》1971,7(7):854-856
It is shown that the electrolysis of furan-2-carboxylic, thiophene-2-carboxylic, and selenophene-2-carboxylic acids in dimethylformamide on platinum electrodes gives N-(2-furoyloxymethyl)-N-methylformamide, N-(2-thenoyloxymethyl)-N-methylformamide, and N-(2-selenoyloxymethyl)-N-methylforniamide, respectively.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 915–917, July, 1971. 相似文献
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