Oxidatively polymerizable thiophene oligomers have been important precursors for conjugated polymeric materials. Such thiophene oligomers containing phosphole moiety have been known in the literature. However, the phosphole rings of these oligomers are typically functionalized at 3 and 4 positions. The a-unit of the side chain are known to cause steric interactions with the polymer back bone. On the other hand, a variety of 1,2,5-triphenylphosphole derivatives with unfunctionalized central phosphole rings are known but they are not feasible for oxidative polymerization. In order to reduce steric hindrance between backbone and the a-unit of sidechains without losing oxidative polymerization capability, 1-phenyl-2,5-bis(2-thienyl)phosphole and its derivatives were synthesized as monomeric precursors for conjugated polymeric materials. Photophysical and electrochemical properties were investigated.

Syntheses and photophysical/electrochemical characterizations of phosphole containing thiophene oligomers

243rd National Meeting (2012)

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