Conjugated oligomers based on various combinations of thiophene and 3,4-ethylenedioxythiophene (EDOT) moieties have been synthesised. Comparison of the optical and electrochemical properties shows that the introduction of a bis-EDOT core in the middle of the system produces a decrease of the HOMO-LUMO gap which is attributed to an enhancement of the planarity and rigidity of the pi-conjugated system. (C) 2000 Elsevier Science Ltd. All rights reserved.
Oligothienylenevinylenes incorporating 3,4-ethylenedioxythiophene (EDOT) units
作者:Mathieu Turbiez、Pierre Frère、Jean Roncali
DOI:10.1016/j.tet.2005.01.107
日期:2005.3
self-rigidification of the conjugated system due to non covalent S⋯O intramolecular interactions. The strong electrondonoreffect of the EDOT units explains the determining role of the relative position of the EDOT units on the localization and stabilization of the positive charges in the radicalcation or dication states.