Synthesis of poly(p-phenylene vinylene)- and poly(phenylene ethynylene)-based polymers containing p-terphenyl in the main chain with alkoxyphenyl side groups

摘要

Starting from the pyrylium salt and following a facile synthetic route, we synthesized and polymerized 4,4"-diiodo-2',6'-di[4-(2'-ethylhexyl)oxy]phenyl-p-terphenyl with p-divinylbenzene or p-diethynylbenzene. The resulting polymers had moderate molecular weights, were amorphous, and dissolved in tetrahydrofuran and chloroform, with glass-transition temperatures of 120-131 degreesC. The polymers behaved as violet-blue-emitting materials with photoluminescence maxima around 420 and 450 nm in solution and in thin films, respectively. They possessed well-defined chromophores resulting from steric interactions in the polymer chain. The photoluminescence quantum yields were up to 0.29. (C) 2002 Wiley Periodicals, Inc. [References: 26]