新型吡啶-杯[4]芳烃荧光探针的合成及其对Fe^(3+)的检测性能

Synthesis and Fe^(3+)Detection Property of A Novel Pyridine-Calix[4]arene Fluorescent Probe

合成了一种新型的高选择性检测Fe^(3+)的上沿功能化吡啶-杯[4]芳烃荧光探针,其结构经^(1)H NMR,^(13)C NMR和HR-MS表征。离子检测实验结果表明:该吡啶-杯[4]芳烃探针的最大吸收峰出现在295 nm处,并在371 nm处显示出一个强的荧光发射带。与其他金属离子相比,新型探针对Fe^(3+)表现出高选择性和强抗干扰能力的荧光淬灭响应。通过荧光滴定法和Job曲线图研究了探针与Fe^(3+)的结合性。结果表明:探针与Fe^(3+)形成2∶1的配合物,缔合常数为3.26×10^(7)M^(-1),检出限为7.9×10^(-7)M。

A novel upper-rim functionalized pyridine-calix[4]arene flourescence probe for highly selective detection of Fe^(3+)was synthesized,and its structure was characterized by^(1)H NMR,^(13)C NMR and HR-MS,respectively.The results of ion detection experiments showed that the maximum absorption peak of the pyridine-calix[4]arene probe appeared at 295 nm and displayed a strong fluorescence emission band at 371 nm.Compared with other metal ions,the probe exhibits fluorescent quenching response to Fe^(3+)with high selectivity and strong anti-interference ability.The binding property of the probe with Fe^(3+)was studied by a combination of fluorescence titration and Job′s plot,and the results indicated that a 2∶1 coordination complex was formed by the probe with Fe^(3+),the association constant was 3.26×10^(7)M^(-1),and the detection limit was 7.9×10^(-7)M.