Abstract

A new photochromic diarylethene with a benzoisothiazole unit has been designed and synthesized. The diarylethene could act as a colorimetric and fluorescence dual-channel chemosensor for CO32− with short response time, high selectivity, and excellent sensitivity. Moreover, the response mechanism of the chemosensor to CO32− was studied systematically in methanol. The chemosensor could be used to the detection of CO32− in practical water samples, and also be made into test papers for CO32− recognition with high efficiency.

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