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Pd2+与9-溴菲(9-BrP)生成稳定配合物,能对9-BrP产生显著的的荧光增敏效应。9-BrP-Pd2+体系的最大激发和发射波长分别为247和364 nm。荧光加强理论计算表明9-BrP与Pd2+形成了配位数为n=3的配合物,结合常数KA为2.812×10-4,线性相关系数r2=0.998 3。9-BrP-Pd2+体系荧光强度在Pd2+浓度为1×10-7~2×10-5mol/L的范围内呈现良好的线性关系(r2=0.996 2)。Pd2+与9-BrP反应具有选择性和专一性,常见金属离子不会对其造成干扰。水样测定与加标回收实验结果也较为理想(回收率>100%),表明9-BrP作为荧光探针用于检测水体中Pd2+的方法具有可行性。
Pd2 + and 9-bromophenanthrene (9-BrP) generate stable complexes, which can produce significant fluorescent sensitization effect on 9-BrP. The maximum excitation and emission wavelengths of 9-BrP-Pd2 + system are 247 and 364 nm, respectively. Fluorescence enhancement theoretical calculations show that 9-BrP and Pd2 + form complexes with coordination number n = 3, the binding constant KA is 2.812 × 10-4, and the linear correlation coefficient r2 is 0.998. The fluorescence intensity of 3.9-BrP-Pd2 + Pd2 + concentration in the range of 1 × 10-7 ~ 2 × 10-5mol / L showed a good linear relationship (r2 = 0.996 2). The reaction of Pd2 + with 9-BrP is selective and specific, and common metal ions do not interfere with it. The results of water sample recovery and spike recovery experiments were also satisfactory (recovery> 100%), indicating that 9-BrP as a fluorescent probe for the determination of Pd2 + in water is feasible.