Chemistry | 2019
Synthesis and Cyclization-Induced Charge Transfer of Rectangular Bisterthiophenesiloxanes.
Abstract
Cyclization modified terthiophene displays the change of emission behavior from locally excited (LE) state to the intramolecular charge transfer (ICT) state. The rectangular bisterthiophenesiloxanes (DSiTh) was successfully prepared by π-π stacking aided hydrogen bonding interactions. Cyclization-induced ICT in DSiTh can apparently be observed, which is confirmed by absorption spectra, fluorescence spectra and quantum chemistry analysis. The cyclization produces a strong intramolecular electron redistribution of a highly packed π-conjugated terthiophene. And thus a distinctive variation of dipole moment and a through-space ICT happen.