Spectroscopic study of some mesogenic cyanophenyls in condensate films andinert matrices

In present work the molecular aggregation and interaction with metallic sil ver of liquid crystalline 4-pentyl-4'-cyanobiphenyl (5CB), 4-pentyl-4'-cyan ophenyl pyridine (5Py), 4-pentyl-4'-cyanophenylcyclohexane (5CH), 4-octyl-4 '-cyanobiphenyl (8CB), 4-octyloxy-4'-cyanobiphenyl (80CB) in molecular cond ensate films and inert matrices has been studied by low temperature reflect ion and transmission vibrational spectroscopy in a wide temperature range 8 0-330 K. The red shift of CN-stretching vibrations band was found to be due to molecular aggregates formation. The factors effecting on their thermody namic stability are considered.