S. Holdcroft, K. Yuen, J. Guillet
May 1, 1990
Citations
0
Influential Citations
3
Citations
Journal
Journal of Polymer Science Part A
Abstract
Photolysis of 2-naphthylenemethyl-1-naphthylacetate (NMNA) and 9-anthracenemethyl-9-anthrylacetate (AMAA) yields radicals of methylnaphthalene and methylanthracene, respectively. The longevity of these radicals makes them suitable probes for studying primary and secondary cage recombination processes in solution, and in polymeric matrices. 2,2-Di-(4-tert-octylphenyl-1-picrylhydrazyl) (DPPH) is utilized as a radical trap to report on radicals which escape from the solvent cage. Quantum yields for photolysis of NMNA and AMAA were determined in solution and in poly(methyl methacrylate) films. Both unimolecular and bimolecular processes are suppressed as a result of the greater effective viscosity in polymeric media.