J. Luo, K.-W. Huang, H. Qu, X. Zhang, L. Zhu, H.S.O. Chan, C. Chi
Org. Lett., 12 (24), 5660-5663, (2010)
H-shaped bridged oligothiophenes HT-1 and HT-2 were synthesized by two different approaches. Different from normal oligothiophenes, HT-1 and HT-2
showed low band gaps and amphoteric redox behaviors due to
intramolecular charge transfer, which is further supported by
time-dependent DFT calculations.