Acetylenic tetrathiafulvalene-dicyanovinyl donor-acceptor chromophores.
Compounds incorporating the tetrathiafulvalene (TTF) donor unit and one or two cyanoethynylethene (CEE) acceptor units were prepared by Knoevenagel condensations of highly unstable, TTF-linked propargylic aldehyde or ketone derivatives. The resulting TTF-CEEs are very strong chromophores with low-energy end-absorptions beyond 900 nm. The molecules experience reversible oxidations of the TTF unit, and the optical properties of the oxidised species were elucidated by spectroelectrochemistry.
Andersson
Asbjørn Sune
AS
Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen Ø.
Diederich
François
F
Nielsen
Mogens Brøndsted
MB