Anodic oxidation of difluorenyls bridged through a dimethylsilyl group and of the 9-trimethylsilyl fluorene: Towards new three-dimensional polyfluorenes

Anodic oxidation of difluorenes bridged by dimethylsilyl moieties leads to the formation of insoluble electroactive films. Compared to classical polyfluorenes and poly(9,9′-difluorenes), the polymer bridged through Si(CH 3) 2 or substituted by Si(CH 3) 3 units are more stable towards oxidation, their yield of polymerization are higher and the conjugation length deduced by their λ max UV–vis absorption bands under their neutral state are more important.