A highly selective chemiluminescent probe for the detection of chromium(VI)
Yan Jin1, Yonghua Sun1, Chongying Li1
1College of Materials and Chemistry & Chemical Engineering, Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institution, Chengdu University of Technology, Sichuan, 610059 Chengdu, PR China.
Abstract:
In present work, rhodamine B hydrazide and rhodamine 6G hydrazide were synthesized and the chemiluminescence performance has been investigated. Based on the chemiluminescence of rhodamine 6G hydrazide‑chromium(VI), a selective and sensitive method for the direct detection of chromium(VI) was developed. The chemiluminescence intensity was linearly related to the concentration of chromium(VI) in the range of 2.60×10-8-8.00×10-6mol/L with a correlation coefficient of r=0.998 and a detection limit of 1.4×10-8mol/L (S/N=3). The results indicated rhodamine 6G hydrazide was an excellent chemiluminescent probe for chromium(VI) without reduction of chromium(VI) to chromium(III). A possible mechanism of CL emission was also suggested.
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