Charge transfer in cross conjugated 4,8-dithienylbenzo[1,2-b:4,5-b′]dithiophene based organic sensitizers

Two novel cross-conjugated isomers based on 4,8-dithienylbenzo[1,2-b:4,5-b']dithiophene have been designed and successfully synthesized. It was found that the charge transfer interaction was much stronger in the benzodithiophene direction as compared with the other perpendicular direction.