Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (7): 1544.doi: 10.7503/cjcu20200085

• Organic Chemistry • Previous Articles     Next Articles

High Selectivity of Enol-keto Tautomers Imine Derivative for the Recognition of Co2+

CAO Cheng1,2,CAO Tian1,YAN Penji1,WANG Qingyun1,YUE Guoren1,2,JI Xiangdong1,*()   

  1. 1. Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Zhangye 734000, China
    2. Kaiyuan Bio-Tech Development Center, Hexi University, Zhangye 734000, China
  • Received:2020-02-19 Online:2020-07-10 Published:2020-04-05
  • Contact: Xiangdong JI E-mail:jxdsn@163.com
  • Supported by:
    † National Natural Science Foundation of China(21761011);Science and Technology Project of Gansu Province, China(18JR3RG205);Scientific Research Foundation of the Higher Education Institutions of Gansu Province, China(2018A-088)

Abstract:

A new enol-keto tautomers imine derivative R was designed and synthesized. The recognition property of the receptor R for 18 kinds of cations was studied by ultraviolet absorption spectroscopy(UV-Vis) analysis and naked-eye detection. The results showed that the receptor R had significant recognition ability for Co2+, Fe2+ and Ni2+ through UV-Vis analysis, which found single colorimetric recognition of Co2+ by color changes. The Job’s plot indicated that the formation of complex between receptor R and Co2+ was in 1:1 stoichiometric ratios, and the limit of lowest detection of receptor R for Co2+ was 4.14×10-7 mol/L. Meanwhile, naked recognition paper of receptor R was prepared. The enol-keto tautomerism of receptor R was illustrated during recognition process through theoretical calculation and nuclear magnetic resonance titration.

Key words: Schiff base receptor, Ion detection, Chemosensor for Co2+, Naked-eye detection

CLC Number: 

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