Mechanically-Driven Vase-Kite Conformational Switch in Cavitand Cross-Linked Polyurethanes.,ChemistryOpen

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Mechanically-Driven Vase-Kite Conformational Switch in Cavitand Cross-Linked Polyurethanes.
ChemistryOpen ( IF 2.5 ) Pub Date : 2020-02-26 , DOI: 10.1002/open.201900345
Martina Torelli ₁ , Francesca Terenziani ₁ , Alessandro Pedrini ₁ , Francesca Guagnini ₁ , Ilaria Domenichelli ₁ , Chiara Massera ₁ , Enrico Dalcanale ₁

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The eligibility of tetraquinoxaline cavitands (QxCav) as molecular grippers relies on their unique conformational mobility between a closed (vase) and an open (kite) form, triggered in solution by conventional stimuli like pH, temperature and ion concentration. In the present paper, the mechanochemical conformational switching of ad hoc functionalized QxCav covalently embedded in an elastomeric polydimethylsiloxane and in a more rigid polyurethane matrix is investigated. The rigid polymer matrix is more effective in converting mechanical force into a conformational switch at the molecular level, provided that all four quinoxaline wings are covalently connected to the polymer.

中文翻译：

机械驱动的空洞和交联聚氨酯中的花瓶风筝构象转换。

四喹喔啉空配体 (QxCav) 作为分子夹持器的资格依赖于其在封闭（花瓶）和开放（风筝）形式之间独特的构象迁移性，在溶液中由 pH、温度和离子浓度等常规刺激触发。在本文中，研究了共价嵌入弹性体聚二甲基硅氧烷和更刚性的聚氨酯基质中的特设功能化 QxCav 的机械化学构象转换。刚性聚合物基质在将机械力转化为分子水平的构象转换方面更有效，前提是所有四个喹喔啉翼均共价连接至聚合物。

更新日期：2020-02-26

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