染料探针分子对水中铜离子的可视化识别及试纸化应用

Specific colorimetric probe for Cu(Ⅱ) in aqueous solution and its application in indicator paper

设计合成了以罗丹明为母体的探针分子RCu,可实现对Cu2+的选择性识别。在HEPES缓冲溶液(2×10-5mol·L-1,p H=7.4)的测试体系中RCu本身无颜色,加入Cu2+后溶液变为粉红色,而且加入其他常见金属阳离子无颜色变化。探针分子可识别较低浓度的Cu2+,检出限可达6.37×10-8 mol·L-1。同时探针分子可用于试纸化检测,对水样中的Cu2+可实现低浓度的检测,具有一定的实用价值。

A new Rhodamine derivative RCu was designed and synthesized as a colorimetric probe for Cu（Ⅱ） with high selectivity. RCu itself has no color in HEPES buffer solution（2×10^-5 mol·L^-1, p H = 7.4）. With Cu^2＋added, the solution turns into pink color, but without change in color with other common metal cations. The probe can recognize Cu^2＋ at low concentrations and the detection limit is 6.37×10^-8 mol·L^-1. Meanwhile, the probe can detect Cu^2＋ in water samples at lower concentrations by indicator paper, indicative of its great potential applications.