A modest colorimetric chemosensor for investigation of CN-in semi-aqueous environment with high selectivity and sensitivity

作者：Maurya Nirma; Bhardwaj Shubhrajyotsna; Singh Ashok Kumar^*

来源：Sensors and Actuators B: Chemical , 2016, 229: 483-491.

DOI：10.1016/j.snb.2016.02.014

• Sensor
• Colorimetric sensor
• CN- ion
• H-1 NMR titration

Two nobel, modest and easily forming anion chemosensors (B1/B2) based on azo linked Schiff base were designed and synthesized. The chemosensors displays large extent of selectivity toward CN- and lesser for AcO- resulting instant color change expressions witnessed in 10% aqueous medium. The limit of detection diagnosed for CN- ion is down to 0.478/1.66 mu M that is below the WHO level. The anion binding property of the chemosensor via deprotonation mechanism is monitored by hydroxyl and H-1 NMR titration. The coated paper test strips is served as mini colorimetric device for finding of CN- in aqueous solution. It can be practiced for quantitative assurance of CN- concentrations in water samples.

• 出版日期2016-6-28