Journal article

RESOLUTION AND CHARACTERIZATION OF ROTAMERS IN 1-PHENYL-2-(2-ANTHRYL)ETHYLENE

KP GHIGGINO, PF SKILTON, E FISCHER

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | AMER CHEMICAL SOC | Published : 1986

Abstract

Time-resolved spectroscopic techniques have enabled the components of the heterogeneous fluorescence of 1-phenyl-2-(2-anthryl)ethylene to be resolved in toluene solution. The emission is rationalized in terms of two species with lifetimes and quantum yields at 25 °C measured to be τ1 = 8.3 ns and ϕ1 = 0.24 and τ2 = 28.25 ns and ϕ2 = 0.97, each with its own distinctive fluorescence and absorption spectra. It is shown that the difference in fluorescence decay times of these two rotameric species is attributable to a difference in their nonradiative rates. Temperature dependence measurements of fluorescence decay have enabled the enthalpy of the equilibrium in the ground state to be estimated a..

View full abstract

University of Melbourne Researchers