A novel dual-channel chemosensor for CN using asymmetric double-azine derivatives in aqueous media and its application in bitter almond.

In this paper, we have designed and synthesized a novel sensor L1 based on asymmetric double-azine derivatives, which showed both "naked eye" recognition and fluorescence responses for CN in DMSO/HO (v/v=4:1, pH=7.20) solution. This simple sensor L1 could distinguish CN from coexisting anions via the way of deprotonation and sensing mechanism of intramolecular charge transfer (ICT), and the minimum detection limit on fluorescence response of the sensor L1 towards CN was down to 9.47×10M. Moreover, we have successfully utilized the sensor L1 to detect CN in bitter almond. Test strips containing L1 were also prepared, which could act as a practical colorimetric tool to detect CN in aqueous media.