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

V. D. Danchuk; A. P. Kravchuk; S. P. Makarenko; Galina A. Puchkovska; S. Chazhengina; E. Kotelnikova

doi:10.1117/12.486655

11 December 2002 Temperature study of resonance intermolecular interaction in the aliphatic crystals using spectra of IR absorption

V. D. Danchuk, A. P. Kravchuk, S. P. Makarenko, Galina A. Puchkovska, S. Chazhengina, E. Kotelnikova

Author Affiliations +

Proceedings Volume 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals; (2002) https://doi.org/10.1117/12.486655
Event: XV International School on Spectroscopy of Molecules and Crystals, 2001, Chernivsti, Ukraine

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 amgnitud eof Davydov splitting Δυ_1,2 of the bands of scissoring and rocking vibrations of methylene chains of long-chain compounds with frequencies 1456 and 720 cm^-1, respectively. This mechanism is connected with damping of the intramolecular vibrational excitons in crystals due to their interactin 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-orientaional disorder type. Good agreement was observed bewteen theoretical and experimental results.

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V. D. Danchuk, A. P. Kravchuk, S. P. Makarenko, Galina A. Puchkovska, S. Chazhengina, and E. Kotelnikova "Temperature study of resonance intermolecular interaction in the aliphatic crystals using spectra of IR absorption", Proc. SPIE 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals, (11 December 2002); https://doi.org/10.1117/12.486655

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