Poly(thiaheterohelicene): a stiff conjugated helical polymer comprised of fused benzothiophene rings.
A novel helical aromatic polymer comprised of fused benzothiophene rings, poly(thiaheterohelicene), was synthesized via an intramolecular ring-closing reaction with a controlled helicity to one-sided bias. The synthetic helicity control involved the induction of the helical conformation and its fixation. The ladder polymer showed both an extended pi-conjugation and planarity and a very stiff helical structure. [structure: see text]
Iwasaki
Tomokazu
T
Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
Kohinata
Yusaku
Y
Nishide
Hiroyuki
H