Chem. J. Chinese Universities ›› 2019, Vol. 40 ›› Issue (4): 676.doi: 10.7503/cjcu20180743

• Analytical Chemistry • Previous Articles     Next Articles

Spectral Detection for Vitamin C and H2O2 Based on the Reversible Color Change and Luminescent Switching Properties of P2Mo18O626-@Tb3+ Mixed Solution

WANG Bin1,2,*(), WANG Xiaohong1, DUAN Limei1, XU Liang1, ZHAO Peng1, JIAN Jinpeng1, LIU Zongrui1,*()   

  1. 1.College of Chemistry and Chemical Engineering, Inner Mongolia University for the Nationalities, Tongliao 028043, China
    2. Inner Mongolia Key Lab of Carbon Nanomaterials, Tongliao 028000, China
  • Received:2018-11-02 Online:2019-04-03 Published:2019-01-09
  • Contact: WANG Bin,LIU Zongrui E-mail:jluwangbin09@163.com;liuzr716@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21501102, 21661026), the Natural Science Foundation of Inner Mongolia, China(Nos.2015BS0207, 2017MS0208), the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region, China(No.NJYT-18-B22) and the Open Project of the Inner Mongolia Key Lab of Carbon Nanomaterials, China(No.MDK2017025).

Abstract:

Based on the functional complementarity and energy transfer between the reversible discoloration polyoxoanions P2Mo18O626- and green luminescent Tb3+ ions, the color of the P2Mo18O626-@Tb3+mixed solution changed from light yellow to dark blue and as meanwhile the luminescence quenched under the reduction of VC. On the contrary, the dark blue color faded and the luminescence recovered correspondingly under the oxidation of H2O2. And the P2Mo18O626-@Tb3+ mixed solution exhibited a reversible chemical response discoloration and luminescent switching properties. The VC concentrations were quantitatively measured by UV-Vis and PL spectroscopy, and the corresponding linear equations were acquired by drawing VC concentrations with UV-Vis absorbance at 800 nm and fluorescence intensity at 547 nm. And the detection limits were 3.40×10-3 and 0.21 μmol/L, respectively. The response rates of VC and H2O2 detection were investigated by UV-Vis and fluorescence kinetic methods, and the response time were 52 and 320 s, respectively. Finally, the selectivity and reusability of VC detection were studied by UV-Vis spectroscopy and kinetic methods.

Key words: Polyoxometalates, Vitamin C, Stimuli-response, Fluorescence switch, Biochemical sensor

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