A novel self-assembled supramolecular sensor based on thiophene-functionalized imidazophenazine for dual-channel detection of Ag+ in an aqueous solution

Hai-Xiong Shi; Wen-Ting Li; Qiao Li; Hai-Li Zhang; You-Ming Zhang; Tai-Bao Wei; Qi Lin; Hong Yao

doi:10.1039/C7RA09597J

A novel self-assembled supramolecular sensor based on thiophene-functionalized imidazophenazine for dual-channel detection of Ag⁺ in an aqueous solution†

Hai-Xiong Shi,^a Wen-Ting Li,^a Qiao Li,^a Hai-Li Zhang,^a You-Ming Zhang,

^a Tai-Bao Wei,

*^a Qi Lin

^a and Hong Yao^a

Author affiliations

* Corresponding authors

^a Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu, P. R. China
E-mail: weitaibao@126.com

Abstract

Herein, a novel self-assembled supramolecular sensor (S1) based on thiophene-functionalized imidazophenazine for Ag⁺ was designed and synthesized. It showed dual-channel detection properties for Ag⁺ based on the competitive mechanism of supramolecular self-assembly with high sensitivity and selectivity even in the presence of other metal ions. Its detection limit for Ag⁺ is 8.18 × 10⁻⁹ M. Upon the addition of Ag⁺, the solution changes from yellow to light purple and the fluorescence is quenched. Furthermore, the sensing mechanism between Ag⁺ and S1 is investigated via IR and ¹H NMR spectroscopy, mass spectrometry, and density functional theory calculations.

This article is part of the themed collection: Editors’ collection: Supramolecular Chemistry

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Article information

DOI: https://doi.org/10.1039/C7RA09597J
Article type: Paper
Submitted: 29 8 2017
Accepted: 07 11 2017
First published: 21 11 2017
This article is Open Access

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RSC Adv., 2017,7, 53439-53444

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A novel self-assembled supramolecular sensor based on thiophene-functionalized imidazophenazine for dual-channel detection of Ag⁺ in an aqueous solution

H. Shi, W. Li, Q. Li, H. Zhang, Y. Zhang, T. Wei, Q. Lin and H. Yao, RSC Adv., 2017, 7, 53439 DOI: 10.1039/C7RA09597J

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