[摘要]：Reversible conductance switching in single quinone-modified oligo(phenylenevinylene)s (OPV) was studied using electrochemical scanning tunnel microscopy. The switching was achieved through electrochemical oxidation/reduction in the quinone moiety of the molecule. The strong electron delocalization of the reduced hydroquinone-OPV structure resulted in the high-conductance state, whereas the weaker delocalization of the oxidized quinone-OPV was responsible for the low-conductance state. The ratio of the conductances was measured to be in excess of 40. (C) 2009 American Vacumn Societh. [DOI: 10.1116/1.3056177]
