Synthesis and optical properties of disiloxane-linked decathiophene and dodecathiophene polymers

摘要

Disiloxane-linked decathiophene and dodecathiophene polymers were prepared and their optical properties were examined. Compared with the monosilane-linked congeners reported previously, these polymers showed slightly redshifted absorption and PL bands in solution. Interestingly, the PL bands were redshifted when the spectra were measured in film, and the redshifts became pronounced as the silicon linkers were elongated from monosilane to disiloxane. This is likely due to the enhanced aggregation of the oligothiophene units, reflecting the improved flexibility of the silicon linkers.