Vibrational relaxation of diphenylacetylene at low temperatures Original Research Article

Raman spectra of the νS(CC) stretching mode of diphenylacetylene dissolved in acetonitrile and methylcyclohexane have been recorded at room temperature and 77 K. The results on vibrational dynamics in liquids at room temperature are compared with those at low temperatures at 77 K. Substantial narrowing of spectra at low temperatures leads to revealing vibrational structure. The results given in this paper are a spectacular example of monitoring structural order going from liquid solutions to frozen matrices at low temperatures by Raman spectroscopy.