Syntheses and spectroscopic studies of spirobifluorene-bridged bipolar systems; photoinduced electron transfer reactions.

Yuh-Yih Chien, Ken-Tsung Wong, Pi-Tai Chou, Yi-Ming Cheng

Index: Chem. Commun. (Camb.) (23) , 2874-5, (2002)

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Abstract

Some 9,9'-spirobifluorene-bridged bipolar systems 1-3 containing 1,3,4-oxadiazole-conjugated oligoaryl and triarylamine moieties have been synthesized, in which 1 exhibits remarkable solvent-polarity dependent fluorescence properties due to a highly efficient photoinduced electron transfer reaction.