A Dynamic and Responsive Host in Action: Light-Controlled Molecular Encapsulation

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• 作者：Dr. Se&aacute ; n T. J. Ryan ; Dr. Jes&uacute ; s del Barrio ; Dr. Reynier Suard&iacute ; az ; Dr. Daniel F. Ryan ; Dr. Edina Rosta and Prof. Dr. Oren A. Scherman
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：December 23, 2016
• 年：2016
• 卷：55
• 期：52
• 页码：16096-16100
• 全文大小：1170K
• ISSN：1521-3773

文摘

The rational design of a flexible molecular box, oAzoBox⁴⁺, incoporating both photochromic and supramolecular recognition motifs is described. We exploit the E↔Z photoisomerization properties of azobenzenes to alter the shape of the cavity of the macrocycle upon absorption of light. Imidazolium motifs are used as hydrogen-bonding donor components, allowing for sequestration of small molecule guests in acetonitrile. Upon E→Z photoisomerization of oAzoBox⁴⁺ the guest is expelled from the macrocyclic cavity.