A near-infrared ratiometric fluorescent probe for rapid and selective detection of hypochlorous acid in aqueous solution and living cells

作者：Xi, Long-Long; Guo, Xue-Fei; Wang, Chen-Liang; Wu, Wen-Li; Huang, Miao-Fei; Miao, Jun-Ying^*; Zhao, Bao-Xiang^*

来源：Sensors and Actuators B: Chemical , 2018, 255: 666-671.

DOI：10.1016/j.snb.2017.08.073

• Rat iometric fluorescence
• Hypochlorous acid
• Fast detection
• Near-infrared
• Large stokes shift
• Cell image

A new ratiometric fluorescent probe (XWJ) was developed on the basis of Forster resonance energy transfer (FRET). The probe constructed by dansyl and 2-(3,5,5-trimethylcyclohex-2-en-l-ylidene) malononitrile, exhibited a higher efficiency of energy transfer (up to 93.59%). The probe emerged excellent sensitivity and selectivity toward hypochlorous acid (HOG). In particular, upon addition of HOCl, the probe can reveal a clear response in 25 s and manifest an obvious change in fluorescence colour from red to bright yellow, which could be recognized by naked eyes. Furthermore, the calibration curve is linear in the concentration range of 0-55 mu M with the detection limit of 0.19 mu M, which means that the probe can detect HOCl in low concentration. Besides, the fluorescence emission of the acceptor arises near infrared region (NIR) and the probe possesses a large pseudo Stokes shift (300 nm) and well-separated dual emission (550/670 nm). The probe showed outstanding sensitivity and selectivity toward HOCl in cell imaging.

• 出版日期2018-2
• 单位山东大学