The rotational behavior of molecular probes in supercooled liquid near the glass transition temperature was investigated using time resolved optical polarization. The dynamics of the liquid immediately sorrounding the rigid probes were also measured by triplet state solvation experiments. The locally correlated quantities of probe rotation time and solvent response time in the case of smaller probe molecules was demonstrated by polarization angle dependent Stokes shift correlation functions. The results are indicative of time averaging being at the origin of exponential rotation of probes whose rotational time constant is slower than solvent relaxation.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry