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

作者:Pei, Peng-Xiang; Hu, Jing-Han*; Chen, Ying; Sun, You; Qi, Jing
来源:Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2017, 181: 131-136.
DOI:10.1016/j.saa.2017.03.052

摘要

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/H2O (v/v = 4:1, pH = 720) 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 x 10(-7) M. 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.