A naphthalimide-based azo colorimetric and ratiometric probe: synthesis and its application in rapid detection of cyanide anions

作者：Hao, Yuanqiang; Chen, Wansong; Wang, Liqiang; Zhou, Binbin; Zang, Qiguang; Chen, Song; Liu, You-Nian^*

来源：Analytical Methods, 2014, 6(8): 2478-2483.

DOI：10.1039/c3ay41931b

• PAPER
• CHEMOSENSORS
• SENSOR
• DYE

A naphthalimide-based azo dye (1) used as a colorimetric and ratiometric probe for the detection of CN- was synthesized by incorporating a salicylaldehyde moiety, which acts as a recognition unit, to the naphthalimido diazonium salt. Upon reacting with CN-, probe 1 displays dramatic colour changes rapidly from yellowish to red, corresponding to the absorption band shift from 408 nm to 497 nm. The colorimetric probe allows ratiometric detection of CN- with a linear range of 2-45 mu M and a LOD (limit of detection) of 0.4 mu M. In the optimized H2O/DMSO (7/3, v/v) mixed solvent, probe 1 displays excellent selectivity for CN- over other anions. In addition, 1 was successfully employed to prepare the filter paper-based test strips which can be used to monitor CN- conveniently, and the discernible concentration of CN- can be as low as 20 mu M.

• 出版日期2014
• 单位中南大学