二维 Zn-MOF 作为高效发光传感器检测水介质和 HEPES 生物缓冲溶液中的 Cr2O72-

IF 2.7 4区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Journal of Cluster Science Pub Date : 2024-09-21 DOI:10.1007/s10876-024-02698-7
Xue-Li Niu, Qian Wu, Hua Yang, Lingqian Kong, Jian-Min Dou
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引用次数: 0

摘要

由于有毒重金属 Cr2O72- 严重危害生态系统和人类健康,因此有效检测水介质中的有毒重金属阴离子残留具有重要意义。本文构建了一种新型二维发光金属有机框架(MOFs){[Zn2(bmida)(phen)]-H2O}n(Zn-MOF)(1,10-phen = 1,10-菲罗啉,H4bmida = N-(膦酰甲基)亚氨基二乙酸),并对其进行了结构表征。值得注意的是,这种 Zn-MOF 作为一种高效的发光传感器,可以在水介质和 HEPES 生物缓冲溶液中检测 Cr2O72-,具有很高的选择性和灵敏度,以及良好的循环稳定性。Zn-MOF 对 Cr2O72- 的相应检测限(LOD)分别低至 1.21 和 5.46 µM,且淬灭常数(Ksv)较大。在 H2O 溶液中的 LOD 低于美国环境保护局(USEPA)建议的饮用水基准,即 1.92 µM。此外,多项实验还表明了一种可能的竞争性能量吸收机制。
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A 2D Zn-MOF as an Efficient Luminescent Sensor for Detecting Cr2O72− in Water Media and HEPES Biological Buffer Solution

Efficient detection of toxic heavy metal anions Cr2O72− residue in water media is of great significance due to its severe damage to ecosystem and human health. Herein, a new 2D (two-dimensional) luminescent metal–organic frameworks (MOFs) {[Zn2(bmida)(phen)]·H2O}n (abbr.Zn-MOF) (1,10-phen = 1,10-phenanthroline, H4bmida = N-(phosphonomethyl)iminodiacetic acid) was constructed and structurally characterized. Notably, this Zn-MOF as an efficient luminescent sensor can detect Cr2O72− both in water media and HEPES biological buffer solution with high selectivity and sensitivity, and good cyclic stability. The corresponding detection limit (LOD) of Zn-MOF towards Cr2O72− is as low as 1.21 and 5.46 µM with large quenching constant (Ksv), respectively. The LOD in H2O solution is lower than the benchmark of drinking water recommended by United States Environmental Protection Agency (USEPA, 1.92 µM). Moreover, a possible competitive energy absorption mechanism is suggested by multiple experiments.

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来源期刊
Journal of Cluster Science
Journal of Cluster Science 化学-无机化学与核化学
CiteScore
6.70
自引率
0.00%
发文量
166
审稿时长
3 months
期刊介绍: The journal publishes the following types of papers: (a) original and important research; (b) authoritative comprehensive reviews or short overviews of topics of current interest; (c) brief but urgent communications on new significant research; and (d) commentaries intended to foster the exchange of innovative or provocative ideas, and to encourage dialogue, amongst researchers working in different cluster disciplines.
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