Dual signaling of hypochlorite in tap water by selective oxidation of phenylselenylated dichlorofluorescein

作者：Choi Myung Gil; Ryu Hyein; Cho Min Jeoung; Lee Seul Ki; Chang Suk Kyu^*

来源：Sensors and Actuators B: Chemical , 2017, 244: 307-313.

DOI：10.1016/j.snb.2016.12.149

• Hypochlorite
• Phenylselenyl moiety
• Hypochlorite-assisted oxidation
• Fluorescence
• Dichlorofluorescein
• Smartphone

A novel hypochlorite-selective signaling probe based on the oxidative transformation of phenylselenylated 2',7'-clichlorofluorescein 1 to its selenoxide analogue was investigated. In a pH 7.0 phosphate buffer system (containing 1% DMF as a solubilizer), the designed probe I exhibited pronounced colorimetric and fluorogenic hypochlorite signaling behavior over other representative oxidants such as hydrogen peroxide, tert-butyl hydroperoxide, perborate, and percarbonate as well as a range of environmentally relevant metal ions and anions. The signaling was due to the hypochlorite-assisted oxidation of the probe's selenyl moiety to selenoxide. Hypochlorite signaling was unaffected by the presence of common metal ions and anions as a background. The hypochlorite-selective fluorescence signaling of probe 1 has a detection limit of 3.9 x 10(-8) M (0.002 ppm). Finally, the determination of hypochlorite concentration in tap water using a smartphone as a stand-alone portable signaling detection and processing tool was successfully demonstrated.

• 出版日期2017-6