Photophysical Processes in Polymer Photodegradation Intrachain Triplet Transfer in Poly(1-Vinylnaphthalene) and Poly(1-Vinylnaphthalene-Co-Methyl Methacrylate)

摘要

Poly(1-vinylnaphthalene) in a rigid glass at 77K exhibits a delayed fluorescence due to triplet-triplet annihilation resulting from intramolecular triplet-energy transfer through the naphthalene chromophores. The delayed fluorescence does not appear in the spectrum of 1-ethylnaphthalene. Delayed emission from the polymer but not from the small-molecule analog is quenched by piperylene. End groups are of greater importance than chain length in the control of triplet migration in the homopolymer; experiments with 1-vinylnaphthalenemethyl methacrylate copolymers, however, indicate that a specific minimum chain length is required for efficient transfer. (Author)