Carpenter鈥檚 Rule Folding in Rigid鈥揊lexible Block Copolymers with Conjugation-Interrupting, Flexible Tethers Between Oligophenylenevinylenes

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• 作者：Jeffrey M. Lucas ; Joelle A. Labastide ; Lang Wei ; Jonathan S. Tinkham ; Michael D. Barnes ; Paul M. Lahti
• 刊名：Journal of Physical Chemistry A
• 出版年：2015
• 出版时间：July 23, 2015
• 年：2015
• 卷：119
• 期：29
• 页码：8010-8020
• 全文大小：620K
• ISSN：1520-5215

文摘

Rigid鈥揻lexible segmented block copolymers were synthesized and characterized as 4.5-oligophenylenevinylene chromophores tethered by flexible, conjugation-interrupting 1,2-ethanedioxy or 1,4-butanedioxy units. The flexible tethers allow the possibility of collapsed order chromophore assemblies within individual polymers by chain folding at specific sites much like an old fashioned, folding carpenter鈥檚 rule. Our results indicate that using a short, flexible tether in a rigid鈥揻lexible segmented copolymer can result in collapsed rodlike structures as signaled by strongly quenched photoluminescence, even after thermal annealing. Such ability to 鈥減rogram鈥?folding and tertiary structure in conjugated copolymers is important for solid-state organic light emitting materials and understanding of organic chromophore self-assembly.