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Synergy of CO2-response and aggregation induced emission in a small molecule: renewable liquid and solid CO2 chemosensors with high sensitivity and visibility

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Abstract

A tetraphenylethylene (TPE) derivative (N,N-dimethyl-N′-(4-(1,2,2-triphenylvinyl)phenyl)acetimidamide, TPE-amidine) was designed and synthesized, and used to prepare visible CO2 chemosensors, TPE-amidine-L (liquid) and TPE-amidine-S (solid). The hydrophilicity of TPE-amidine thoroughly changed because of the unique reversible reaction between the amidine group and CO2, which controlled the molecular aggregation extent in water by CO2. Combining with the well-known aggregate-induced emission effect, the highly selective CO2 chemosensor TPE-amidine-L was developed, which has the lowest CO2 detection limit of 24.6 ppm compared with other reported CO2 chemosensors, and can be regenerated within 10 s by adding triethylamine. With the aim of being safer and more convenient to use, a polyacrylamide hydrogel containing TPE-amidine was prepared as a renewable CO2 sensing “tape” (TPE-amidine-S). The flexibility, adhesivity, CO2 sensitivity and reversibility of the “tape” is systematically investigated, showing great potential for “on-site” and “real-time” CO2 detection in practical applications.

Graphical abstract: Synergy of CO2-response and aggregation induced emission in a small molecule: renewable liquid and solid CO2 chemosensors with high sensitivity and visibility

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Supplementary files

Article information


Submitted
27 Jan 2020
Accepted
05 Mar 2020
First published
06 Mar 2020

Analyst, 2020, Advance Article
Article type
Paper

Synergy of CO2-response and aggregation induced emission in a small molecule: renewable liquid and solid CO2 chemosensors with high sensitivity and visibility

Z. Mai, H. Li, Y. Gao, Y. Niu, Y. Li, N. F. de Rooij, A. Umar, M. S. Al-Assiri, Y. Wang and G. Zhou, Analyst, 2020, Advance Article , DOI: 10.1039/D0AN00189A

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