设计合成了一种罗丹明B类衍生物RhA，并用荧光和紫外分析法检测其特性。RhA探针对Cu²⁺的识别具有唯一性，在2×10^-5 mol/L HEPES-CH₃CN（体积比1：1，含0.1 mol/L NaNO₃，pH=7.4）溶液中，RhA单独存在下是无颜色的，荧光强度较低；滴入Cu²⁺后，溶液渐变为粉红色，而且荧光显著加强，却对其他常见金属离子基本无响应。荧光光谱显示RhA对较低浓度Cu²⁺的检测仍然呈良好的线性关系。本探针对于真实水体环境中Cu²⁺的快速即时检测具有一定实用价值。

RhA,a kind of rhodamine B derivative,is designed and synthesized,and its characteristics is detected by means of fluorescence and ultraviolet analysis methods.RhA probe is a chemo-sensor for Cu²⁺.RhA alone has no color and low fluorescence intensity in a 2×10^-5 mol·L^-1 HEPES-CH₃CN (a volumetric ratio of 1:1,containing 0.1 mol·L^-1 of NaNO₃,pH=7.4) solution.After adding Cu²⁺,the solution gradually turns pink,and the fluorescence is significantly enhanced,but there is hardly response to other common metal ions.The fluorescence spectrum show that RhA still shows a good linear relationship for the detection at a lower concentration of Cu²⁺ at 10 μmol·L^-1.This method has potential application value for the rapid and real-time detection of Cu²⁺ in actual water environment.

杨志强(1994-),男,硕士生