Polarizability and internal charge transfer in thiophene-triphenylamine hybrid π-conjugated systems

J Phys Chem B. 2011 Aug 4;115(30):9379-86. doi: 10.1021/jp203759e. Epub 2011 Jul 7.

Abstract

Extended star-shaped conjugated systems consisting of dicyanovinyl electron-acceptor units connected to a triphenylamine 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.