Recent experimental results are presented for three reaction systems: (a) the recombination of geminate radical pairs in benzoyl peroxide microcrystals, (b) the relaxation of mobile charge carriers in semiconducting powders of cadmium sulfide and (c) the photoisomerization of trans-stilbene adsorbed at the interface between Al2O3 and liquid hexane. The dynamic for each of these systems is found to be strongly dependent on the local mobility of the reactive species. Data are presented showing the initial state depletion and partial recovery of trans-stilbene after photoexcitation in solution and adsorbed on Al2O3. The long time plateau in solution has been attributed to the formation of the cis isomer which has a smaller absorption cross section than trans-stilbene. On the surface, recovery of trans-stilbene is nearly complete.
|Number of pages||2|
|Journal||American Chemical Society, Polymer Preprints, Division of Polymer Chemistry|
|State||Published - Sep 1989|
|Event||Papers Presented at the Miami Beach, FL Meeting: Polymer Preprints - Miami Beach, FL, USA|
Duration: Sep 10 1989 → Sep 15 1989