A novel porous Zn-MOF based on binuclear metal clusters for fluorescence detection of Cr(VI) and adsorption of dyes

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2024-11-01 DOI:10.1016/j.molstruc.2024.140553

Yang-Tian Yan , Xu-Dong Fan , Jia-Lei Lu , Zheng-Hua Yang , Yi-Bo Zhang , Yun-Long Wu , Wen-Yan Zhang , Yao-Yu Wang

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引用次数: 0

Abstract

A novel Zn-MOF: {[Zn₃(L)₂(H₂O)₄]·(H₂O)₃·(CH₃CN)₃}_n was synthesized from tricarboxylate pyridine ligand 3-(2,4-dicarboxyphenyl) -4-carboxypyridine (H₃ L) under solvothermal conditions. Zn-MOF was a three-dimensional porous framework composed of binuclear metal cluster [Zn₂(COO)₃ N] and a variety of metal oxygen chains. The fluorescence study of Zn-MOF indicated that the maximum emission peak is 449 nm (λex=335 nm), and it had varying degrees of quenching effect on Cr₂O₇²⁻and CrO₄²⁻ in water, the limits of detection are 4.29×10⁻⁴ M and 9.19×10⁻⁵ M, respectively. It also showed good recycling ability, which was a potential multi-functional anion fluorescence probe material. In addition, the dye adsorption and separation experiments of Zn-MOF showed that it can adsorb MB⁺ and MG⁺, but almost no adsorption for MO⁻, and can effectively separate MB⁺ and MG⁺ from the mixed solution of MB⁺/MO⁻ and MG⁺/MO⁻. It was a potential multi-functional material for the capacity to selectively separate cationic dyes from anionic and cationic mixed solutions, as well as selective recognition of Cr₂O₇²⁻and CrO₄²⁻anions.

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基于双核金属团簇的新型多孔 Zn-MOF，用于荧光检测六价铬和吸附染料

新型 Zn-MOF: {[Zn3(L)2(H2O)4]-(H2O)3-(CH3CN)3}n 是由三羧酸吡啶配体 3-(2,4-二羧基苯基) -4- 羧基吡啶 (H3 L) 在溶热条件下合成的。Zn-MOF 是由双核金属团簇 [Zn2(COO)3 N] 和多种金属氧链组成的三维多孔框架。对 Zn-MOF 的荧光研究表明，其最大发射峰为 449 nm（λex=335 nm），对水中的 Cr2O72 和 CrO42- 有不同程度的淬灭作用，检测限分别为 4.29×10-4 M 和 9.19×10-5 M。它还表现出良好的回收能力，是一种潜在的多功能阴离子荧光探针材料。此外，Zn-MOF 的染料吸附和分离实验表明，它能吸附 MB+和 MG+，但几乎不吸附 MO-，并能从 MB+/MO-和 MG+/MO- 混合溶液中有效分离 MB+和 MG+。它具有从阴离子和阳离子混合溶液中选择性分离阳离子染料的能力，以及选择性识别 Cr2O72 和 CrO42 阴离子的能力，是一种潜在的多功能材料。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

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