A Novel Colorimetric and Fluorometric Dual-Channel Chemosensor based on A Conjugated Perylene-Benzothiazole System for Highly Selective Detection of Cyanide in Aqueous Media.

A novel cyanine compound based on the conjugated perylene-benzothiazole system (PBI) as a colorimetric and fluorometric dual-channel sensor for cyanide (CN ) detection was synthesized and characterized via UV-vis and fluorescence spectroscopy. PBI exhibited a high sensitivity and rapid optical response for CN due to the intramolecular charge transfer (ICT) mechanism. The detection limit of PBI for CN was 1.15×10  M in the mixture of DMSO/H O (1 : 1, v/v). Moreover, probe PBI demonstrated high selectivity and sensitivity for CN over other common anions, including Cl , Br , F , I , AcO , ClO , HSO , SO , NO , NO and SCN . This work provided a simple and effective approach to trace the toxic CN ion with rapid response, high selectivity, and sensitivity that is possibly applied in environmental control and agricultural management.