A multifunctional fluorescence sensor based Zn(II) metal-organic framework for rapid and sensitive detection Fe3+ and Al3+

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2024-10-03 DOI:10.1016/j.poly.2024.117246

Xiaojing Mao , Huachang Li , Yehong Shi , Jiemin Liu , Lijun Kuai , Fei Yang , Chenmin Wu

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Abstract

Recognition and detection of Fe³⁺ and Al³⁺ ions in water are important for human health and life. Herein, a novel multifunctional fluorescence sensor based on zinc-based metal-organic frameworks (Zn-MOF) was developed using zinc nitrate hexahydrate and pyridine-2,5-dicarboxylic acid by solvothermal condition, and characterized by X-ray single crystal diffraction, elemental analysis, powder X-ray diffraction (PXRD), etc. The PXRD experiment results observed that the structure of Zn-MOF is rearranged after water molecules exchanged all 3 DMF solvates in the pores. Fluorescent sensing experiments revealed that Zn-MOF exhibits high sensitivity in detecting Fe³⁺ and Al³⁺ by significant fluorescence quenching. The limit of detection (LOD) of Fe³⁺ and Al³⁺ were 0.18 μM and 0.064 μM, respectively. The anti-interference experiment revealing that Zn-MOF has a high selectivity to detect Fe³⁺ and Al³⁺. In addition, the quenching mechanism of Zn-MOF was demonstrated to be attributed to the inner filter effect (IFE). Furthermore, in the real sample detection of tap water, the recoveries of Fe³⁺ and Al³⁺ were 103.0 %–107.9 % and 106.1 %–110.5 %, respectively, and the relative standard deviations (RSD) were less than 7.42 % and 6.20 %, respectively. This work provided an reliable method for the quantitative detection of Fe³⁺ and Al³⁺ and was successfully applied in tap water with satisfactory recovery and precision.

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基于 Zn(II) 金属有机框架的多功能荧光传感器，用于快速灵敏地检测 Fe3+ 和 Al3+

识别和检测水中的 Fe3+ 和 Al3+ 离子对人类健康和生活非常重要。本文以六水硝酸锌和吡啶-2,5-二羧酸为原料，采用溶热法研制了一种基于锌基金属有机框架（Zn-MOF）的新型多功能荧光传感器，并通过X射线单晶衍射、元素分析、粉末X射线衍射（PXRD）等方法对其进行了表征。PXRD 实验结果表明，Zn-MOF 的结构在孔隙中的 3 种 DMF 溶剂被水分子交换后发生了重新排列。荧光传感实验表明，Zn-MOF 对 Fe3+ 和 Al3+ 的检测灵敏度高，荧光淬灭明显。Fe3+ 和 Al3+ 的检测限（LOD）分别为 0.18 μM 和 0.064 μM。抗干扰实验表明，Zn-MOF 对检测 Fe3+ 和 Al3+ 具有较高的选择性。此外，Zn-MOF 的淬灭机制被证明是由内部滤波效应（IFE）引起的。此外，在自来水的实际样品检测中，Fe3+ 和 Al3+ 的回收率分别为 103.0 %-107.9 % 和 106.1 %-110.5 %，相对标准偏差（RSD）分别小于 7.42 % 和 6.20 %。该研究为自来水中Fe3+和Al3+的定量检测提供了一种可靠的方法，其回收率和精密度均令人满意。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.