Study of 4-(1H-benzo[d] oxazole-2-yl)-2-methoxyphenol for cyanide ion detection

Benzoxazole containing moiety S3 was productively synthesized and functional for detection of CN^-ion. The S3 moleculealtered its colour for darkbrown to dark green on accumulation of the CN^-iononly in Dimethyl Sul foxidesolvent. The limit of detection and association constant (K_a) were 0.4 × 10^-6 M and 1.0 × 10⁷ M^-1; and 0.46 × 10^-4 M and 1.0 × 10⁵ M^-1 resolute by UV-visible spectroscopic titration and fluorescence titration, correspondingly.