Volume 36, Issue 1 pp. 59-62
Concise Report

pH-Responsive Host−Guest Complexation between a Water-soluble Pillar[7]Arene and a 2,7-Diazapyrenium Salt and Its Application in Controllable Self-assembly

Zhengtao Li

Zhengtao Li

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

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Jie Yang

Jie Yang

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

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Feihe Huang

Corresponding Author

Feihe Huang

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

E-mail: [email protected].; Tel.: 0086-0571-87953189; Fax: 0086-0571- 87953189Search for more papers by this author
First published: 09 November 2017
Citations: 16

Abstract

A novel host−guest recognition motif based on a water-soluble pillar[7]arene (WP7) and a 2,7-diazapyrenium salt (DMDAP) was prepared. According to the integrated results of 1H NMR, 2D NOESY, UV–vis spectroscopy and fluorescence titration experiments, we demonstrated that the molecular recognition of WP7 to DMDAP in water not only has high association constant but also has pH-responsiveness. Subsequently, we took advantage of this molecular recognition motif to fabricate a supra-amphiphile based on WP7 and an amphiphilic 2,7-diazapyrenium derivative DAPAC. Its controllable self-assembly in water was also investigated by means of TEM and DLS techniques.

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