Low Temperature Physics: 27, 666 (2001); https://doi.org/10.1063/1.1399207 (10 pages)
Fizika Nizkikh Temperatur: Volume 27, Number 8 (August 2001), p. 901-914    ( to contents , go back )

Dimers of phenol in argon and neon matrices

A. M. Plokhotnichenko, E. D. Radchenko, Yu. P. Blagoi, and V. A. Karachevtcev

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., 61103 Kharkov, Ukraine
E-mail: plokhotnichenko@ilt.kharkov.ua

Received May 21, 2001

Abstract

The IR absorption spectra of the phenol molecules in the matrices of solidified inert gases agron (10-12 K) and neon (4,5-5 K) are studied in the frequency range 400-4000 cm-1 with molar phenol-matrix ratios ranged from 1:1000 to 1:30. The bands of dimers and of more complicated complexes of the phenol molecules are revealed in the absorption spectrum with decreasing the matrix ratio in both matrices. The two additional bands this first to appear in the spectrum in the region of the stretching vibration of the O-H group with increase in the phenol concentration, are attributed to dimers with one and two hydrogen bonds. The absorption coefficients are determined for the bands of stretching vibrations of O-H and C-O groups, of planar bending O-H vibrations of monomers and of stretching vibrations of hydrogen-bonded O-H groups of the phenol molecules. The peculiarities of the formation of the H-bonded complexes in the low temperature matrices are discussed, and a model is proposed, which permits the numbers of monomers, dimers and more complicated complexes in the argon and neon matrices to be calculated for molecules similar in size to that of the phenol molecule.

PACS:
82.30.Nr - Association, addition, insertion, cluster formation

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