Push-pull-substituted oligo(2,5-thienyleneethynylene)s

Article abstract of DOI:10.1055/s-2006-926348

Oligo(2,5-thienyleneethynylene)s (OTE) with terminal donor-acceptor substitution were synthesized by applying Sonogashira-Hagihara reactions and a protection group technique. The combination of the alkylthio and nitro substituents provides a DAOTE series, whose long-wavelength absorption shows a monotonous bathochromic effect for increasing numbers n of repeat units. The convergence limit is already reached for n = 3. Georg Thieme Verlag Stuttgart.