Raman study of the vibrational relaxation of the ν(C≡N) stretching mode of acrylonitrile in binary liquid mixtures with hydrogen donor solvents

Abstract

The precise Raman linewidths, wavenumber shifts and integrated intensities of the isotropic parts of the Raman spectra in the C≡N stretching region 2210–2250 cm-1 were obtained for the ν(C≡N) stretching mode of acrylonitrile (acryl) in (acryl + phenol) and (acryl + methanol) binary mixtures. The concentration dependence of the wavenumber shifts and linewidth changes was examined in both systems and the experimental results thus obtained in the case of the (acryl + methanol) system were explained using the indirect dephasing model, which is based on Anderson–Kubo formalism. In the case of the (acryl + phenol) system, the variation of ΓL with C was explained in terms of trimer formation. © 1998 John Wiley & Sons, Ltd.