Journal of Physical Chemistry B, Vol.115, No.30, 9379-9386, 2011
Polarizability and Internal Charge Transfer in Thiophene-Triphenylamine Hybrid pi-Conjugated Systems
Extended star-shaped conjugated systems consisting of dicyanovinyl electron-acceptor units connected to a triphe-nylamine core by means of thiophene (T), thienylenevinylene (TV), and bithiophene (BT) conjugating spacers have been synthesized. The analysis of the electronic properties of the molecules by UV-vis absorption spectroscopy, cyclic voltammetry, and theoretical calculations shows that the electronic properties of the systems depend on the length and rigidity of the conjugating spacer.