ROTATIONAL DEPOLARIZATION OF FLUORESCENCE IN LOW-VISCOSITY SOLUTIONS

The experimental investigation of rotational depolarization carried ou t for prolate molecules with short lifetimes (0.1-1.0 ns) and in low-v iscosity solutions (0.1-1.0 cP) explores the region where lifetimes be come comparable with time scales of the slowly varying tails of the ra ndom torque autocorrelation functions. Therefore, the simple model bas ed on the ''white noise'' random torque must be revised. The new pheno menological model of rotational depolarization is proposed and illustr ated by experimental data.