Consecutive Conformational Transitions and Deaggregation of Multiple-Helical Poly(diacetylene)s

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• 作者：Jan Weiss ; Eike Jahnke ; Nikolai Severin ; Jü ; rgen P. Rabe ; Holger Frauenrath
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：8
• 期：6
• 页码：1660 - 1666
• 全文大小：1782K
• 年卷期：v.8,no.6(June 2008)
• ISSN：1530-6992

文摘

The polymerization of diacetylene macromonomers based on oligopeptide−polymer conjugates yields conjugated polymers with multiple-helical quaternary structures. These polymers exhibit a rich dynamic folding behavior upon the addition of protic cosolvents. Thus, a helix−helix transition under helix-sense inversion was followed by a reversible helix−coil transition. Both transitions involved changes in the aggregation state of the multiple-helical superstructures. The resemblance of the observed consecutive and cooperative conformational transitions to those of biopolymers underlines the importance of supramolecular self-assembly as a pathway toward biofunctional materials with optoelectronic activity.