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设计、合成了一种新颖的三角架结构罗丹明B衍生物(2).在乙醇-水(8/1,V/V)介质中,用Tris-HCl控制体系pH为6.8,观察到Cu2+对化合物2的荧光及紫外-可见吸收增强性能,同时化合物2对Cu2+具有较高的选择性响应.选择最大激发和发射波长为557/577nm,测定了探针2(1.00×10-5mol·L-1)对Cu2+响应的校准曲线,线性范围为0.10~10.00×10-5mol·L-1,相关系数R2=0.9964(n=15),检出限为1.129×10-7mol·L-1,平行测定5次的相对标准偏差(R.S.D.)为2.2%;以557nm为最大吸收波长测定紫外吸收,Cu2+响应的浓度线性范围为0.50~25.00×10-5mol·L-1,相关系数R2=0.9948(n=13),检出限为3.338×10-7mol·L-1.
A novel tripod-based rhodamine B derivative (2) was designed and synthesized. The pH of the system was controlled to 6.8 with ethanol and water (8/1, V / V) The fluorescence and UV-vis absorption enhancement properties of compound 2 were investigated, and the selectivity response of Cu2 + to compound 2 was higher than that of compound 2. The maximum excitation and emission wavelength of 557 / 577nm were selected and the concentration of probe 2 (1.00 × 10-5mol·L- 1) The calibration curve of Cu2 + response was linear with the range of 0.10-10.00 × 10-5mol·L-1 and the correlation coefficient R2 = 0.9964 (n = 15). The detection limit was 1.129 × 10-7mol·L-1. The relative standard deviation (RSD) was 2.2% after 5 times of determination. The UV absorbance was measured at the wavelength of 557nm. The linear range of Cu2 + was 0.50 ~ 25.00 × 10-5mol·L-1. The correlation coefficient R2 was 0.9948 (n = 13), the detection limit was 3.338 × 10-7mol·L-1.