@article{ZHENG2023, 
author = {Jiahong ZHENG and Yan ZHOU},
title = {PO43– Ions Detection Based on UiO–66–NH2@Eu–MOFs Ratio Fluorescent Probes},
year = {2023},
journal = {Journal of the Chinese Ceramic Society},
volume = {51},
number = {3},
pages = {796-802},
keywords = {fluorescence, phosphate, ligand–metal charge transfer, ligand–metal energy transfer, antenna effect},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20220809},
doi = {10.14062/j.issn.0454-5648.20220809},
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 1–12 μmol/L. The sensor constructed has a good selectivity and accuracy, thus providing an effective way for the rapid detection of PO43– ions.}
}