Abstract

Dynamics of molecules or molecular constituents doped in amorphous systems is recently of considerable interest. In these systems, it is important to know how rigidly the doped molecules (guest) are bound to the surrounding polymer matrix. The nature of the guest-matrix interaction, on which this rigidity depends, is not so well understood at present. The motion of the doped molecules or their constituents is influenced by the surrounding matrix. Molecular motions having no appreciable internal potential barrier, are ideal probes of matrix rigidity, since matrix friction or viscosity is the only impediment to the motion of molecules or molecular constituents in these cases.

© 1994 Optical Society of America