Supramolecular Polymerization Controlled by Reversible Conformational Modulation

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• 作者：Jiang-Fei Xu ; Zehuan Huang ; Linghui Chen ; Bo Qin ; Qiao Song ; Zhiqiang Wang ; Xi Zhang
• 刊名：ACS Macro Letters
• 出版年：2015
• 出版时间：December 15, 2015
• 年：2015
• 卷：4
• 期：12
• 页码：1410-1414
• 全文大小：350K
• ISSN：2161-1653

文摘

We report a new method for fabricating supramolecular polymers with controlled structure and molecular weight through reversible conformational modulation. To this end, the crown-ether-based 鈥渢aco complex鈥?was introduced. We prepared a monomer containing a bis(m-phenylene)-32-crown-10 in the core, which can supramolecularly polymerize efficiently in solution. When the conformation of the crown ether core was folded into a taco complex, the linear supramolecular polymerization could be significantly depressed, thus decreasing the molecular weight of the supramolecular polymer. In addition, extracting the depolymerizing agent with aqueous solution of cucurbit[7]uril could disassociate the taco complex and regenerate the supramolecular polymer with molecular weight as high as before. It is anticipated that this study can provide a facile and general methodology for controllable supramolecular polymerization.