S. Scheib et al., IN SEARCH OF D-SIGMA-A MOLECULAR RECTIFIERS - THE D-SIGMA-A SYSTEM DERIVED FROM TRIPTYCENEQUINONE AND TETRATHIAFULVALENE, Thin solid films, 329, 1998, pp. 100-103
Several D-sigma-A compounds (4a, 4b, 6a, and 6b) have been synthesized
, which contain a sterically hindered quinone tethered by a tetramethy
lene 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 electr
on withdrawal through the a bridge. Monolayers of 4b and 6b are metast
able at the air-water interface. (C) 1998 Elsevier Science S.A. All ri
ghts reserved.