Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (6): 990-996.doi: 10.1007/s40242-019-9033-5

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Fluorescent Turn-on Probe Based on Napthalimide Fused Triphenylamine Unit for Quickly Detecting Thiophenol in Aqueous Solution

SUN Jiaojiao1, CAO Jian1, CHENG Hailong2, WANG Jincheng1, WANG Shuxin1   

  1. 1. School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, P. R. China;
    2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
  • Received:2019-02-01 Revised:2019-09-02 Online:2019-12-01 Published:2019-11-29
  • Contact: SUN Jiaojiao E-mail:caoj@sues.edu.cn
  • Supported by:
    Supported by the Innovation Fund for Graduate Students of Shanghai University of Engineering Science, China (Nos.17KY0408, 18KY0416), the Talent Program of Shanghai University of Engineering Science, China(No.2017RC422017) and the Degree and Postgraduate Education Teaching Reform Research Project of Shanghai University of Engineering Science, China (No.17XJC002).

Abstract: A novel molecular probe system(NapTpa-dnbs) was prepared based on the chromophore napthalimide fused triphenylamine unit. NapTpa-dnbs was tuned to absorb a large fraction of UV and near-infrared radiation. The turn-on fluorescent response of NapTpa-dnbs to thiophenol caused an increased fluorescent emission by a factor of 11.5 at 597 nm in a PBS buffer solution. The photoinduced electron transform(PET) process of the probe became less feasible with the addition of thiophenol than that of the free probe. NapTpa-dnbs demonstrated high selective and sensitive detection toward thiophenol with respect to other competitive amine acids. The detection limit was determined to be 2.03×10-7 mol/L thiophenol. The sensing process is rapid(3 min). NapTpa-dnbs can accurately detect the thiophenol with a qualified recovery in real water samples. NapTpa-dnbs on test strips can detect the thiophenol vapour in the atmosphere.

Key words: Napthalimide, Probe, Thiophenol, Turn-on, Fluorescent