Thin Solid Films, Vol.327-329, 100-103, 1998
In search of D-sigma-A molecular rectifiers: the D-sigma-A system derived from triptycenequinone and tetrathiafulvalene
Several D-sigma-A compounds (4a, 4b, 6a, and 6b) have been synthesized, which contain a sterically hindered quinone tethered by a tetramethylene chain to a substituted tetrathiafulvalene (TTF). Compounds 6a and 6b show a dramatic increase (approximate to 450 mV) in the oxidation potential of the dipyrrolo-TTF unit, suggestive of considerable electron withdrawal through the a bridge. Monolayers of 4b and 6b are metastable at the air-water interface.