A new fluorescent probe of rhodamine B derivative for the detection of copper ion

作者：Mei Ling; Xiang Yu; Li Na; Tong Aijun^*

来源：Talanta, 2007, 72(5): 1717-1722.

DOI：10.1016/j.talante.2007.02.002

• copper(II)
• rhodamine B hydrazide oxalamide
• fluorescence enhancement
• probe

A new fluorescent probe, rhodamine B hydrazide oxalamide (RBHO), which shows very weak fluorescence, was synthesized, and its fluorescence could be substantially enhanced by the addition of copper ion. The probe shows a high selectivity and sensitivity to copper ion by forming a 1: 1 complex in acetonitrile, and the chelating is reversible. Limit of detection for copper ion in acetonitrile was found to be 3.7 x 10(-8) mol L-1. It was also found that copper ion could catalyze the hydrolysis of the probe in 50% (v/v) buffered (10 mM Tris-HCl, pH 7.0) water/acetonitrile giving a highly fluorescent product, and the fluorescence detection of copper ion was developed in this neutral buffered media with a detection limit of 6.4 x 10(-7) mol L(-)1. Determination of copper ion in water and synthetic samples in the presence of different interfering metal ions was successfully carried out with the new probe RBHO.

• 出版日期2007-7-31
• 单位清华大学