镧系元素
检出限
配体(生物化学)
金属有机骨架
化学
水溶液中的金属离子
对苯二甲酸
选择性
金属
线性范围
吡啶
无机化学
离子
组合化学
分析化学(期刊)
物理化学
色谱法
有机化学
吸附
生物化学
受体
聚酯纤维
催化作用
作者
Miaomiao Li,Hui Dong,Yanan Chen,Weiju Hao,Yixin Wang,Yaqian Zhang,Ziyi Zhang,Yajuan Hao,Ying Zhou,Fēi Li,Lantao Liu
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:16 (6): 899-906
摘要
Accumulation of heavy metals in humans and mammals causes health problems due to their abundance as transition metal ions. Iron (Fe2+) serves significantly in numerous biological processes as a heavy metal ion. In this study, we have designed and prepared a metal-organic framework (MOF) utilizing a one-step solvothermal process, incorporating a dual-ligand combination of terephthalic acid (H2BDC) and α,α',α''-tert-pyridine (TPY) with Eu3+ as the metal node. For this MOF, we termed it Eu-BDC/TPY. Eu-BDC/TPY has superior selectivity over other metal cations. It provides an accurate, sensitive, broad linear range colorimetric method for detecting Fe2+ in a concentration range of 1-50 μM with a modest limit of detection (0.33 μM). Eu-BDC/TPY detects the absence of Fe2+ quickly (within 5 seconds), which is very valuable in practical applications. In addition, the results can be used to create a digital image colorimetric card (DIC) using colorimetric software, enabling instantaneous detection of Fe2+ concentration using a smartphone.
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