Highly selective and sensitive chemosensor based on 2,3-diaminophenazine hydrochloride for the detection of cyanide in pure water and its application in plant seed samples

Abstract

In this study, we prepared an efficient chemosensor based on 2,3-diaminophenazine hydrochloride, and it exhibited good dissolvability in water; more importantly, it could act as an efficient chemodosimeter for the selective detection of CN⁻ in pure water. Upon reacting with CN⁻, 2,3-diaminophenazine hydrochloride (Q1) displayed a remarkable visible and fluorescence response simultaneously with significant changes in both absorption and fluorescence spectra. Furthermore, the absorption and fluorescence detection limits of CN⁻ were 1.95 × 10⁻⁷ M and 1.13 × 10⁻⁹ M, respectively. For practical applications, test strips based on this chemosensor could serve as convenient CN⁻ detection tools. The chemosensor was also successfully applied to the detection of CN⁻ in plant seeds and several natural water samples.