A red-emitting fluorescent and colorimetric dual-channel sensor for cyanide based on a hybrid naphthopyran-benzothiazol in aqueous solution

作者：Li, Junjian; Qi, Xiaoliang; Wei, Wei; Zuo, Gancheng; Dong, Wei^*

来源：Sensors and Actuators B: Chemical , 2016, 232: 666-672.

DOI：10.1016/j.snb.2016.04.021

• Red-emitting
• Cyanide (CN-)
• Nucleophilic addition
• Naked eye detectiona

A selective and sensitive red-emitting fluorescent and colorimetric dual-channel sensor, which could be used for the detection of cyanide, was developed based on a conjugated naphthopyran-benzothiazol system. Upon the addition of CN- anion, the sensor displayed very large blue-shift in both fluorescence (130 nm) and absorption (100 nm) spectra. The bleaching of the solution's color could be clearly observed by the naked eye. Other anions nearly had no interference. By the nucleophilic attacking of CN- to the benzothiazol C=N bond of the sensor, the intramolecular charge transfer was blocked with color and spectra changed. The detection limit of sensor for CN- was found to be 0.

• 出版日期2016-9
• 单位南京理工大学