A Stable Viologen-Based Metal–Organic Framework for Fluorescence Detection of Nitroaromatics and Nitrofuran Antibiotics in Water

IF 3.4 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Crystal Growth & Design Pub Date : 2025-01-28 DOI:10.1021/acs.cgd.4c01709

Shi Zhang, Yudie Zhou, Anna Tuo, Shufan Chen, Qingfu Zhang, Xu Zhang, Kecai Xiong* and Yanli Gai*,

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Abstract

The solvothermal reaction of In³⁺ and 1,1′-bis(4-carboxyphenyl)-(4,4′-bipyridinium) dichloride (H₂bcbpCl₂) in the presence of oxalate resulted in the formation of a 3D metal–organic framework (1) with a 6⁵.8 topology. Compound 1 features a unique oxalate-bridged honeycomb (hcb) layer [In₂(μ₂-C₂O₄)₃]_∞, pillared by bcbp ligands. To the best of our knowledge, this presents the first documented 3D metal–organic coordination polymer constructed by an oxalate-bridged hcb layer. Remarkably, compound 1 demonstrates selective detection of nitroaromatics and nitrofurans in water through a fluorescence quenching mechanism, exhibiting high quenching efficiencies (K_sv) and low limits of detection (LOD). Mechanistic studies reveal that this quenching phenomenon is attributed to photoinduced electron transfer (PET), inner filter effect (IFE) and fluorescence resonance energy transfer (FRET). Moreover, compound 1 displays photochromic properties, with the structural variations and electron transfer pathways elucidated through single-crystal X-ray diffraction (SC-XRD) analysis.

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水中硝基芳香族和硝基呋喃类抗生素荧光检测稳定的紫外光基金属有机骨架

在草酸盐存在下，In3+与1,1′-双（4-羧基苯基）-（4,4′-联吡啶）二氯（H2bcbpCl2）发生溶剂热反应，形成了拓扑结构为65.8的三维金属有机骨架(1)。化合物1具有独特的草酸桥蜂窝（hcb）层[In2(μ2-C2O4)3]∞，由bcbp配体支撑。据我们所知，这是第一个由草酸桥接hcb层构建的三维金属有机配位聚合物。值得注意的是，化合物1通过荧光猝灭机制选择性检测水中的硝基芳烃和硝基呋喃，具有高猝灭效率（Ksv）和低检出限（LOD）。机理研究表明，这种猝灭现象归因于光致电子转移（PET）、内滤效应（IFE）和荧光共振能量转移（FRET）。此外，化合物1具有光致变色性质，通过单晶x射线衍射（SC-XRD）分析揭示了化合物1的结构变化和电子转移途径。

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.

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