Studies of the photolysis of aromatic esters in solution and in polymer films

✍ Scribed by Steven Holdcroft; Kenneth H. Yuen; James E. Guillet

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 565 KB
• Volume: 28
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/pola.1990.080280616

✦ Synopsis

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.