Title

Self-quenching of the triplet state of a semifluorinated polyimide in solution

Document Type

Article

Publication Date

5-8-2000

Department

Polymers and High Performance Materials

Abstract

Triplet lifetimes of semifluorinated polyimides and related model compounds were determined using laser hash photolysis. It was found that the triplet lifetimes of polyimides in relatively good solvents were about 10 times less than those of N-arylphthalimide models. The significant reduction in the tripler lifetimes of the polymers is attributed to an intrachain self-quenching process of the triplet state via interaction between main chain chromophores. Triplet lifetimes of one of the semifluorinated polyimides polymers in a variety of solvents of varying solvent powers were measured. In relatively poor solvents, more than a 10-fold reduction in the triplet lifetimes was observed compared to the lifetimes in relatively good solvents, suggesting that intrachain self-quenching readily occurs due to enhanced coiling of the polymer in the poor solvents, (C) 2000 Elsevier Science S.A. All rights reserved.

Publication Title

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Volume

133

Issue

1-2

First Page

7

Last Page

10