Oligothiophene as photonic/electronic property modulator

Several different series of conjugated oligomers bearing various π-centers such as dithienothiophene (DTT), fluorene and terthiophene moieties, attaching electron donor and/or electron acceptor units through conjugation were synthesized and assessed for their nonlinear optical, two-photon absorption and redox properties. Discussion is made on the property modulation role of the π-centers, particularly by DTT oligothiophene, which displays a unique and efficient electronic mediation.