作者
Wenyu Zhang, William R Dichtel, Adam Z Stieg, Diego Benítez, James K Gimzewski, James R Heath, J Fraser Stoddart
发表日期
2008/5/6
期刊
Proceedings of the National Academy of Sciences
卷号
105
期号
18
页码范围
6514-6519
出版商
National Academy of Sciences
简介
Mechanically interlocked compounds, such as bistable catenanes and bistable rotaxanes, have been used to bring about actuation in nanoelectromechanical systems (NEMS) and molecular electronic devices (MEDs). The elaboration of the structural features of such rotaxanes into macromolecular materials might allow the utilization of molecular motion to impact their bulk properties. We report here the synthesis and characterization of polymers that contain π electron-donating 1,5-dioxynaphthalene (DNP) units encircled by cyclobis(paraquat-p-phenylene) (CBPQT4+), a π electron-accepting tetracationic cyclophane, synthesized by using the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). The polyrotaxanes adopt a well defined “folded” secondary structure by virtue of the judicious design of two DNP-containing monomers with different binding affinities for CBPQT4+. This efficient approach to the …
引用总数
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W Zhang, WR Dichtel, AZ Stieg, D Benítez… - Proceedings of the National Academy of Sciences, 2008