Methanol plays an important role in studying the structure and dynamics of hydrogen bonds in alcohols and other physiologically important compounds in the condensed state. The physical vapor deposition method and two-beam interferometry make it possible to study the structure of polyatomic molecules, the nature and character of intermolecular interactions, and the internal structure of various compounds. Thus, it becomes possible to analyze changes in the internal structure of substances near the points of their phase transitions and glass transitions at ultralow temperatures. In this work, we have studied the effect of nitrogen and nitrous oxide on the dependence of refractive indices of methanol on temperature and on structural-phase transformations upon heating from 16 to 160 K.
This paper presents the results obtained in the study
of structural
phase transitions in thin films of R134A. The samples were condensed
on a substrate by physical deposition of R134A molecules from the
gas phase. Structural phase transformations in samples were investigated
by observing the changes in characteristic frequencies of Freon molecules
in the mid-infrared range with the help of Fourier-transform infrared
spectroscopy. The experiments were carried out in the temperature
range from 12 to 90 K. A number of structural phase states, including
glassy forms, were detected. The changes in thermogram curves at fixed
frequencies of half-widths of absorption bands of R134A molecules
were revealed. These changes indicate a large bathochromic shift of
these bands at frequencies of ν = 842 cm–1, ν = 965 cm–1, and ν = 958 cm–1 and a hypsochromic shift of the bands at frequencies
of ν = 1055 cm–1, ν = 1170 cm–1, and ν = 1280 cm–1 at temperatures from T = 80 K to T = 84 K. These shifts are
related to the structural phase transformations in the samples.
Abstract. The article is devoted to the creation of efficient economic mechanisms of innovative systems self-development regulation. In the current social and economic conditions stimulating innovative development remains one of the most important tasks of the state economic policy. One of the instruments used to activate the innovative processes is the territories of advancing social and economic development. A special legal regime in such territories provides various preferences for their residents, including tax benefits. The criteria of the preferences provided to the entities are formal, and the management mechanisms of the territory are "indistinct" and subjective. In this regard the development and research of the mechanisms stimulating positive dynamics of economic development according to the actual growth of production efficiency are presented.
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