Dl. Vangeneugden et al., A general synthetic route towards soluble poly(1,3-dithienylisothianaphthene) derivatives, SYNTH METAL, 101(1-3), 1999, pp. 120-121
'Formal' copolymers consisting of bithiophene and aromatic isothianaphthene
units, based on 1,3-dithienylisothianaphthene (DTI) derivatives, have been
synthesized. The obtained materials have low band gaps and show high intri
nsic conductivities. The polymers are obtained after oxidative polymerizati
on of the corresponding DTI monomers with FeCl3. Solubilizing alkyl and thi
oalkyl side chains where introduced on different locations of the DTI skele
ton. The substituents also influence the stability of the DTI monomers and
the band gap of the polymers.