Benzothiazole appended 2,2'-(1,4-phenylene)diacetonitrile for the colorimetric and fluorescence detection of cyanide ions.

A benzothiazole appended 2,2'-(1,4-phenylene)diacetonitrile derivative (2,2')-2,2'-(1,4-phenylene)bis(3-(3-(benzo[]thiazol-2-yl)-4-hydroxyphenyl)acrylonitrile) (PDBT) has been synthesized and investigated as a novel sensor, capable of showing high selectivity and sensitivity towards CN over a wide range of other interfering anions. After reaction with CN, PDBT shows a new absorption peak at 451 nm with a color transformation from colorless to reddish-brown. When yellow fluorescent PDBT is exposed to CN, it displays a significant increase in fluorescence at 445 nm, resulting in strong sky-blue fluorescence emission.

Zinc ion detection using a benzothiazole-based highly selective fluorescence "turn-on" chemosensor and its real-time application.

A new photochromic fluorescence chemosensor was devised and effectively synthesized using benzothiazole and imidazopyridine derivatives. A "turn-on" fluorescence sensor BIPP for Zn detection was developed and has a quick response, excellent sensitivity, and remarkable selectivity over other metal ions. When Zn was added to the BIPP solution, a new strong fluorescence emission peak at 542 nm formed with a considerable increase in intensity.