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Synthesis 2006(6): 1009-1015
DOI: 10.1055/s-2006-926348
DOI: 10.1055/s-2006-926348
PAPER
© Georg Thieme Verlag Stuttgart · New YorkPush-Pull-Substituted Oligo(2,5-thienyleneethynylene)s
Further Information
Received
2 August 2005
Publication Date:
27 February 2006 (online)
Publication History
Publication Date:
27 February 2006 (online)
Abstract
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.
Key words
alkynes - conjugation - coupling - heterocycles - sulfur
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