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Novel π-conjugated polymers 10a − c having the phosphole unit were prepared by palladium complex-catalyzed coupling of bis( p -bromophenyl)phosphole ( 7 ) with diethynylarenes 9a − c . The obtained polymers 10a − c were regio-regulated with the 2,5-substituted phosphole unit and characterized by 1 H and 31 P NMR. Polymers 10a − c were found to be an extended π-conjugated system according to the results of the UV−vis absorption spectra. In the fluorescence emission spectra of 10, moderate emission peaks were observed in the visible region. These polymers showed electron-donating properties in cyclic voltammometry measurements.
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Morisaki et al. (2003) studied this question.
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