Temperature study of resonance intermolecular interaction in the aliphatic crystals using spectra of IR-absorption

V. D. Danchuk, A. P. Kravchuk, S. P. Makarenko, G. A. Puchkovskaya, S. Chazhengina, E. Kotelnikova

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Abstract

In this work, on the example of odd-numbered normal paraffins and α-olefins we propose a mechanism which explains the temperature dependence of the magnitude of Davydov splitting Δν1,2 of the bands of scissoring and rocking vibrations of methylene chains of long-chain compounds with frequencies 1465 and 720 cm-1, respectively. This mechanism is connected with damping of the intramolecular vibrational excitons in crystals due to their interaction with orientational defects of the lattice which emerge as a result of excitation of librational-rotational degrees of freedom of organic molecules in the region of the phase transition of order - orientational disorder type. Good agreement was observed between theoretical and experimental results.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4938
DOIs
Publication statusPublished - 1 Dec 2001
EventSelected Papers from the International Conference on Spectroscopy of Molecules and Crystals - Chernihiv
Duration: 23 Jun 200130 Jun 2001

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Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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