The influence of rotational depolarization on the mechanism of energy transport in two-component systems: The nature of correlations

The correlation effect in two-component systems of different viscosities was analyzed based on a concentration depolarization experiment. The inclusion of a correlation effect was found to be fully justified only in systems for which the localization time, _l, is considerably shorter than that of the rotational relaxation, _rot. On the grounds of an approximate analysis, taking into account the competition between the concentration and the rotational depolarization, it was possible to explain the concentration changes in the emission anisotropy in the systems investigated.Dedicated to Professor Czestaw Bojarski on the occasion of his 70th birthday.