Dithieno[2,3-d:2',3'-d']naphtho[1,2-b:3,4-b']-dithiophene - a novel electron-rich building block for low band gap conjugated polymers

A feasible synthesis of 10,11-dl(3,7-dimethyloctyloxy)dithieno[2,3-d:2',3'-d']naphtho[1,2-b:3,4-b']dithiophene (NDT) was presented, and a novel low band gap (LBG) NDT-based polymer was prepared and characterized. The preliminary results indicate that NDT can be used as a novel electron-rich building block in the development of LBG conjugated polymers.