A new chromogenic and fluorescence chemosensor based on naphthol–bisthiazolopyridine hybrid: Fast response and selective detection of multiple targets, silver, cyanide, sulfide, hydrogen sulfide ions and gaseous H2S
A novel chemosensor 1 based on naphthol–bisthiazolopyridine hybrid was synthesized and characterized. Among the various screened cations and anions, chemosensor 1 selectively recognized Ag+ and CN¯ ion, relying on the color change and a distinct absorption and emission changes. On the other hand, probe 1•Ag+ is operable well for selective monitoring of S2-, HS− and H2S as evidenced by the different color and optical changes. The selective detection of all anions is simply based on the breaking of intramolecular hydrogen bonding of 1, followed by protonation or deprotonation mechanism. In general, 1 is a promising indicator in terms of its ease-of-use, selectivity, sensitivity, rapid response (<1 s). Moreover, the visual detection and concentration determination of these analytes by solution or solid kits is an advantage for the practical application of this sensor.