Chemical Research in Chinese Universities ›› 2009, Vol. 25 ›› Issue (5): 628-632.

• Articles • Previous Articles     Next Articles

Synthesis and Analytical Application of Bis(2-diazoaminobenzothiazoyl)-benzidine to Determination of Mercury Ion by Fluorimetry

JIANG Run-sheng2, FENG Feng1,2,3*, CHEN Ze-zhong1, BAI Yun-feng1,3, LIN Sen2 and FU Guo-liang2   

  1. 1. School of Chemistry, Shanxi Datong University, Datong 037009, P. R. China;
    2. Department of Chemistry, Nanchang University, Nanchang 330047, P. R. China;
    3. Institute of Organic Chemistry, Shanxi Datong University, Datong 037009, P. R. China
  • Received:2008-07-07 Revised:2008-08-29 Online:2009-09-25 Published:2009-12-07
  • Contact: FENG Feng. E-mail: feng-feng64@263.net
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20575057) and the Natural Science Foundation of Shanxi Province, China(No.2009011015-1).

Abstract:

A new fluorescent reagent bis(2-diazoaminobenzothiazoyl)-benzidine(BDABTB) was synthesized by combining benzothiazole with benzidine and triazene reagent. The product was confirmed by elemental analysis, 1H NMR and FTIR. The excitation and emission wavelengths of BDABTB were 214 and 338 nm in a basic medium, respectively. The fluorescence was quenched by Hg2+ selectively and sensitively. The linear range of Hg2+ was 1.0×10–8―1.0×10–5 mol/L with a detection limit of 5.0×10–10 mol/L. It has been used to determine trace Hg2+ in water sample with satisfactory results.

Key words: Bis(2-diazoaminobenzothiazoyl)-benzidine; Mercury; Fluorescence quenching