Abstract:
The kinetics of the structural first order phase transition in the tetracosane С$_{24}$Н$_{50}$ monodisperse samples is studied with the help of FTIR spectroscopy. The temperature dependencies of the frequency and intensity of rocking ($\nu$$\sim$ 720 cm$^{-1}$) and bending ($\nu$$\sim$ 1470 cm$^{-1}$) vibrations of СН$_2$-groupes in the methylene trans-sequences in the crystalline cores of the elementary lamellae are investigated. It is shown that the first order solid phase transition is developing on a heterogeneous mechanism in the narrow temperature interval ($\Delta T\sim$ 2 K) according to the theory of the diffused first order phase transitions and is due to the crystalline cell symmetry change.
Keywords:$n$-alcanes, phase transitions,theory of diffuse phase transitions, IR spectroscopy.
This work was supported by Program no. 32 of the Presidium of the Russian Academy of Sciences “Nanostructures: physics, chemistry, biology, and fundamentals of technologies”.
Citation:
V. A. Marikhin, S. A. Gur'Eva, L. P. Myasnikova, B. Z. Volchek, D. A. Medvedeva, “Study of the kinetics of the phase transition of the first order in tetracosane С$_{24}$Н$_{50}$ by Fourier-transform IR spectroscopy”, Fizika Tverdogo Tela, 61:10 (2019), 1831–1835; Phys. Solid State, 61:10 (2019), 1785–1789
\Bibitem{MarGurMya19}
\by V.~A.~Marikhin, S.~A.~Gur'Eva, L.~P.~Myasnikova, B.~Z.~Volchek, D.~A.~Medvedeva
\paper Study of the kinetics of the phase transition of the first order in tetracosane С$_{24}$Н$_{50}$ by Fourier-transform IR spectroscopy
\jour Fizika Tverdogo Tela
\yr 2019
\vol 61
\issue 10
\pages 1831--1835
\mathnet{http://mi.mathnet.ru/ftt8662}
\crossref{https://doi.org/10.21883/FTT.2019.10.48256.470}
\elib{https://elibrary.ru/item.asp?id=41174925}
\transl
\jour Phys. Solid State
\yr 2019
\vol 61
\issue 10
\pages 1785--1789
\crossref{https://doi.org/10.1134/S1063783419100251}
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https://www.mathnet.ru/eng/ftt/v61/i10/p1831
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