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[1]郭舒婷,张 寒,郑华明,等.铕金属有机框架材料的制备与荧光检测MnO4-的研究[J].武汉工程大学学报,2025,47(04):393-398,404.[doi:10.19843/j.cnki.CN42-1779/TQ.202503025]
　GUO Shuting,ZHANG Han,ZHENG Huaming,et al.Synthesis of a europium-based metal-organic framework material for fluorescence sensing of MnO4-[J].Journal of Wuhan Institute of Technology,2025,47(04):393-398,404.[doi:10.19843/j.cnki.CN42-1779/TQ.202503025]
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铕金属有机框架材料的制备与荧光检测MnO4-的研究


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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
47
期数:
2025年04期
页码:
393-398,404
栏目:
现代大化工
出版日期:
2025-08-29

文章信息/Info

Title:
Synthesis of a europium-based metal-organic framework material for fluorescence sensing of MnO4-
文章编号:
1674 - 2869（2025）04 - 0393 - 06
作者:
武汉工程大学材料科学与工程学院，湖北 武汉 430205
Author(s):
School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
关键词:
Keywords:
分类号:
O661
DOI:
10.19843/j.cnki.CN42-1779/TQ.202503025
文献标志码:
A
摘要:
高锰酸钾（KMnO4）作为一种强氧化剂，其不当排放会对生态系统和人类健康造成严重威胁。本研究以5-(4-羧基苯氧基)间苯二甲酸（H3cpia）为有机配体，以稀土Eu3+为金属中心离子，采用水热合成法成功制备了铕基金属有机框架材料[Eu(cpia)(H2O)2]n·nH2O。该材料展现出优异的荧光性能，最大发射峰位于616 nm（5D0→7F2跃迁）。以该材料作为荧光探针，通过选择性、滴定和抗干扰实验发现，[Eu(cpia)(H2O)2]n·nH2O对MnO4-离子具有特异性识别能力，在0~100 μmol/L浓度范围内呈现良好的线性关系（R2=0.999），检测限低至0.142 μmol/L，猝灭常数高达8.96×103 L/mol。此外，该探针对常见共存离子（包括F-、CO32-、PO43-等）表现出良好的抗干扰能力。紫外-可见吸收光谱证实，MnO4-在300~400 nm处的宽吸收带与[Eu(cpia)(H2O)2]n·nH2O的激发光谱（200~400 nm）高度重叠，导致内滤效应的发生，这是荧光猝灭的主要原因。[Eu(cpia)(H2O)2]n·nH2O是一种高效、可靠的MnO4-荧光探针，有望应用在水环境监测领域。
Abstract:
Potassium permanganate (KMnO4)，a strong oxidizing agent，poses significant threats to ecosystems and human health when improperly discharged. Using 5-(4-carboxyphenoxy) isophthalic acid (H3cpia) as organic ligand and rare earth Eu3+ as metal center ion, we successfully synthesized europium-based metal-organic framework material, [Eu(cpia)(H2O)2]n·nH2O, via the hydrothermal method. This material exhibited excellent fluorescence properties with a maximum emission peak at 616 nm (5D0→7F2 transition). Employing this material as a fluorescent probe, selectivity experiments, titration analyses, and anti-interference tests revealed that [Eu(cpia)(H2O)2]n·nH2O has specific recognition capabilities for MnO4- ions, showing a linear relationship (R2 = 0.999) within the concentration range of 0-100 mmol/L, with a low detection limit of 0.142 mmol/L and a high quenching constant of 8.96×103 L/mol. Notably, the probe displays outstanding anti-interference performance against common coexisting ions (including F-, CO32-, and PO43-, etc.). Ultraviolet-visible absorption spectra confirmed that the broad absorption band of MnO4- in the 300-400 nm region significantly overlaps with the excitation spectrum (200-400 nm) of [Eu(cpia)(H2O)2]n·nH2O，inducing an inner filter effect，which is identified as the primary mechanism for fluorescence quenching. These findings demonstrated that [Eu(cpia)(H2O)2]n·nH2O serves as a highly efficient and reliable fluorescent probe for MnO4- detection, showing promising potential for water environment monitoring applications.

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备注/Memo

备注/Memo:
收稿日期：2025-03-31
基金项目：国家自然科学基金（21001085）
作者简介：郭舒婷，硕士研究生。Email：1509784787@qq.com
*通信作者：郭俊芳，博士，教授。Email：junfangguo@aliyun.com
引文格式：郭舒婷，张寒，郑华明，等.铕金属有机框架材料的制备与荧光检测MnO4-的研究［J］. 武汉工程大学学报，2025，47（4）：393-398，404.
更新日期/Last Update: 2025-08-29