Charge transport in photoswitchable dimethyldihydropyrene-type single-molecule junctions
Diego Roldan1, Veerabhadrarao Kaliginedi, Saioa Cobo
1Département de Chimie Moléculaire, UMR CNRS-5250, Institut de Chimie Moléculaire de Grenoble, FR CNRS-2607, Université Joseph Fourier Grenoble I, BP 53, 38041 Grenoble Cedex 9, France.
Abstract:
The conductance properties of a photoswitchable dimethyldihydropyrene (DHP) derivative have been investigated for the first time in single-molecule junctions using the mechanically controllable break junction technique. We demonstrate that the reversible structure changes induced by isomerization of a single bispyridine-substituted DHP molecule are correlated with a large drop of the conductance value. We found a very high ON/OFF ratio (>10(4)) and an excellent reversibility of conductance switching.
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