LANGMUIR-BLODGETT-FILMS OF A DONOR SUBSTITUTED BIANTHRONE DERIVATIVE

The compound thyl-6-octadecyl-1,4-dithiafulven-6-yl)-bianthrone forms stable Langmuir films at a water/argon interface. Oxidative decoupling of the bianthrone - and dithiafulven halfs of the molecule occur at t he interface in the presence of light and oxygen. Transfer to hydropho be substrates by vertical dipping leads to Langmuir-Blodgett films of the Y-type. The fluorescence and the corresponding molecular charge tr ansfer band, present in nonpolar solutions, are preserved when molecul es go from solution to LB-films. The A- to B-form transformation of th e bianthrone moiety could not be accomplished in the LB-films under ex perimental conditions similar to those which lead to the B-form in sol ution.