Temperature dependence of excimer formation in N-vinyl carbazole polymers

Abstract

The fluorescence from cationically prepared poly(N-vinyl carbazole) and a series of N-vinyl carbazole-butyl vinyl ether copolymers has been investigated over the temperature range 90-300 K. Emission from these polymers may be assigned to fluorescence from single excited carbazole chromophores and at least two types of intrachain excimer. Temperature-dependent fluorescence measurements show that the activation energies for excimer formation are quite low (<10 kJ mol-1) indicating that major chain rearrangements are not required during the excited-state lifetime in order to produce appropriate excimer sites. © 1984.