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(E)-2-((benzo[ d ]thiazol-2-ylimino)methyl)-4-nitrophenol 1 and (E)-2-(((6-methoxybenzo[ d ]thiazol-2-yl)imino)methyl)-4-nitrophenol 2 were synthesized efficiently under microwave conditions. The structures were confirmed using IR, ¹H NMR, and 13 C NMR. UV-vis. Fluorescence investigations demonstrated that 1 and 2 are sensitive and selective sensors for detection of cyanide over all other anions SCN &amp;minus; , AcO &amp;minus; , N₃ &amp;minus; , H₂PO₄ &amp;minus; , H₂AsO₄ &amp;minus; , F &amp;minus; , Cl &amp;minus; , Br &amp;minus; , and I &amp;minus; in aqueous media. Cyanide induces colorimetric change from pale yellow to dark yellow and from transparent to pale yellow for 1 and 2, respectively. It enhances the absorption at wavelengths 385 nm and 425 nm of 1 and 385 nm and 435 nm of 2 . Acidic anions H₂PO₄ &amp;minus; and H₂AsO₄ &amp;minus; displayed significant interference with the interaction of cyanide and sensors 1 and 2 . Sensor 1 has lower detection limit (LDL) 1 &amp;times; 10 &amp;minus;6 M, while 2 has LDL 1.35 &amp;times; 10 &amp;minus;6 M.

Substituted 2-Aminobenzothiazoles Salicylidenes Synthesis and Characterization as Cyanide Sensors in Aqueous Medium