Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (5): 742-745.doi: 10.1007/s40242-016-6001-1

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A Fluorescent and Colorimetric Probe Based on Isatin-appended Rhodamine for the Detection of Hg2+

CHEN Jiayi1, SHU Wei1, WANG Enju2   

  1. 1. School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, P. R. China;
    2. Key Laboratory of Tropical Medicinal Plant Chemistry, Ministry of Education, Hainan Normal University, Haikou 571158, P. R. China
  • Received:2016-01-04 Revised:2016-05-05 Online:2016-10-01 Published:2016-06-27
  • Contact: WANG Enju E-mail:enjuwang@163.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21162010).

Abstract:

A new fluorescent probe for the detection of Hg2+ was designed and synthesized via attaching N-methylisatin to rhodamine B hydrazide through an imine linkage. In an ethanol-Tris buffer medium, the addition of Hg2+ caused a strong orange fluorescence and a visual color change from colorless to pink. Other coexisting metal ions did not interfere with the detection of Hg2+. The research on the detection of Hg2+ in natural water suggested the possibility of practical applications in environment monitoring. Based on ESI-MS analysis, the Hg2+-sensing mechanism was proposed.

Key words: Fluorescent probe, Isatin, Rhodamine B, Mercury(Ⅱ) ion