ELECTROCHEMICAL-BEHAVIOR OF SELF-ASSEMBLED MONOLAYERS BASED ON FUNCTIONALIZED OLIGOTHIOPHENES

Self-assembled monolayers (SAMs) of 6-(2,2':5 ',2''-terthien-5yl)-hexa nethiol (alpha-3T-hex-SH) have been prepared onto platinum substrates. The anodic oxidation of the monolayer effects a polymerisation of the monolayer. The conjugation length of the polymer is significantly hig her than that of the terthiophene-derivative, although a major part of the terminal CH-alpha bonds of the terthiophenes are still available for reactions with other monomers. This suggests a contribution of the aromatic CH-beta positions at the formation of the conjugated polymer .