Volume 133, Issue 11 pp. 5830-5834
Zuschrift

Azobenzene-Based Macrocyclic Arenes: Synthesis, Crystal Structures, and Light-Controlled Molecular Encapsulation and Release

Yuezhou Liu

Yuezhou Liu

State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027 P. R. China

These authors contributed equally to this work.

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Hongliang Wang

Hongliang Wang

Department of Chemistry, Zhejiang University, Hangzhou, 310058 China

These authors contributed equally to this work.

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Peiren Liu

Peiren Liu

State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027 P. R. China

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Huangtianzhi Zhu

Huangtianzhi Zhu

State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027 P. R. China

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Prof. Dr. Bingbing Shi

Corresponding Author

Prof. Dr. Bingbing Shi

College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070 China

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Prof. Dr. Xin Hong

Corresponding Author

Prof. Dr. Xin Hong

Department of Chemistry, Zhejiang University, Hangzhou, 310058 China

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Zheda Road 38, Hangzhou, 310027 China

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Prof. Dr. Feihe Huang

Corresponding Author

Prof. Dr. Feihe Huang

State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027 P. R. China

Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001 P. R. China

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First published: 09 December 2020
Citations: 30

Abstract

Azobenzene (azo)-based macrocycles are highly fascinating in supramolecular chemistry because of their light-responsiveness. In this work, a series of azo-based macrocyclic arenes 1, 2, 3, and 4, distinguished by the substituted positions of azo groups, is rationally designed and synthesized via a fragment-cyclization method. From the crystal and computed structures of 1, 2, and 3, we observe that the cavity size of these azo-macrocycles decreases gradually upon EZ photoisomerization. Moreover, light-controlled host–guest complexations between azo-macrocycle 1 and guest molecules (7,7,8,8-tetracyanoquinodimethane, terephthalonitrile) are successfully achieved. This work provides a simple and effective method to prepare azo-macrocycles, and the light-responsive molecular-encapsulation systems in this work may further advance the design and applications of novel photo-responsive host–guest systems.

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