VIBRATIONAL-RELAXATION OF DIPHENYLACETYLENE AT LOW-TEMPERATURES

Raman spectra of the nu(C=C) stretching mode of diphenylacetylene diss olved 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 nan owing of spectra at low temperatures leads to revea ling vibrational structure. The results given in this paper are a spec tacular example of monitoring structural order going from liquid solut ions to frozen matrices at low temperatures by Raman spectroscopy. (C) 1998 Published by Elsevier Science B.V.