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以发射蓝色荧光的Ui O–66–NH2和发射红色荧光的Eu–MOFs为荧光基团，构建了比率荧光探针(Ui O–66–NH2@Eu–MOFs)，成功应用于环境水样中的微量PO43–的检测。将发射蓝色荧光UiO–66–NH2与发射红色荧光Eu–MOF结合，构建了测定环境水样中的微量PO43–的比率荧光探针。结果表明：当PO43–存在时，由于配体–金属电荷转移(LMCT)效应的减弱，导致UiO–66–NH2的荧光增强；另一方面，PO43–和Eu3+的强配位作用将阻止配体–金属的能量转移(LMET)，破坏了“天线”效应并导致Eu–MOF的荧光猝灭，在最优条件下，F445/F633与PO43–在1～12μmol/L浓度范围内呈现良好的线性关系，表明该传感器对检测PO43–有较好的选择性和灵敏性，为PO43–的快速检测提供了一种新思路。
Abstract：Using blue-emitting UiO–66–NH2 with red-emitting Eu–MOF as fluorescence groups,a ratio fluorescence probe(UiO–66–NH2@Eu–MOF) was constructed and successfully applied to the determination of trace PO43–ions in environmental water samples.A ratiometric fluorescent probe for the determination of trace PO43–ions in environmental water samples was constructed via combining blue-emitting UiO–66–NH2 with red-emitting Eu–MOF.As PO43–ions concentration increases,the coupling of PO43–ions with Zr4+ions in UiO–66–NH2 leads to a weakened ligand–metal charge transfer effect,effectively restoring the luminescence of UiO–66–NH2.Also,an intense coordination of Eu3+ions with PO43–ions can hinder the ligand–metal energy transfer,destroy the"antenna"effect,and lead to the quenching of Eu–MOF fluorescence.Under optimal conditions,a ratio of the fluorescence intensity at 445 nm to the fluorescence intensity at 633 nm is linearly related to PO43–ions concentration in the range of 1-12μmol/L.The sensor constructed has a good selectivity and accuracy,thus providing an effective way for the rapid detection of PO43–ions.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20220809
中图分类号:X832;O657.3
引用信息:
[1]郑佳红,周艳.基于UiO–66–NH_2@Eu–MOFs比率荧光探针的构建及其对PO_4~(3–)检测[J].硅酸盐学报,2023,51(03):796-802.DOI:10.14062/j.issn.0454-5648.20220809.
基金信息:
陕西省自然科学专项基金(2020JM-221); 陕西省重点研发项目(2022GY-358); 长安大学中央高校基本科研业务费专项资金资助(300102310203,300102311405,300102312406,300102312405); 大学生创新创业训练计划(S202210710247)
2023-02-07
2023-02-07
2023-02-07