Fizika Nizkikh Temperatur: Volume 43, Number 12 (December 2017), p. 1773-1779    ( to contents , go back )

Spectroscopic study of cluster formation processes in methanol trapped in a nitrogen matrix

Ye. Vaskivskyi1, I. Doroshenko1, Ye. Chernolevska1, V. Pogorelov1, and G. Pitsevich2

1Taras Shevchenko National University of Kyiv, Departments of Physics 64/13 Volodymyrska Str., Kyiv 01601, Ukraine
E-mail: dori11@ukr.net

2Белорусский государственный университет пр. Независимости, 4, г. Минск, 220030, Республика Беларусь

Received May 12, 2017, revised June 14, 2017

Abstract

IR absorption spectra of methanol trapped in a nitrogen matrix were registered at different temperatures from 9 to 34 K. Changes occurring during matrix temperature increasing has been analyzed. Using quantum chemical calculations of geometry and spectral parameters of different methanol clusters an assignment of the observed absorption bands was made. Cluster content of the sample was determined for each temperature. It is shown that during matrix heating a redistribution be-tween different cluster structures, which exist in the sample, occurs, from smaller clusters to bigger ones.

PACS: 36.40.Mr Spectroscopy and geometrical structure of clusters;
PACS: 37.10.Pq Trapping of molecules.

Key words: matrix isolation; methanol; vibrational spectroscopy; infrared absorption; cluster.

Published online: October 25, 2017

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