Construction of two isomorphic multifunctional MOFs via a dual-ligand strategy for aromatic compounds detection and photocatalytic degradation performance

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Structure Pub Date : 2024-11-04 DOI:10.1016/j.molstruc.2024.140600

Pei Huang , Meng-Qi Tuo , Guo Xin-Yu , Sheng-Rui Zhang , Jiu-Fu Lu , Dong Wang

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Abstract

The development of multifunctional and structurally unique metal−organic frameworks (MOFs) presents a highly attractive yet challenging endeavor for chemists. In this study, we employ a dual-ligand strategy to synthesize two isomorphic Co/Zn MOFs, {[Co₄(BMIP)₃(MIP)₄]·3DMF·H₂O}_n (SNUT-35-Co) and {[Zn₄(BMIP)₃(MIP)₄]·2DMF·2H₂O}_n (SNUT-35-Zn). The photocatalytic performance of SNUT-35-Co and SNUT-35-Zn was evaluated using methylene blue (MB). Under UV/visible-light irradiation, the photocatalytic decolorization rates of MB for SNUT-35-Co and SNUT-35-Zn reached 95 % within 140 min and 120 min, respectively, indicating their superior degradation. Notably, SNUT-35-Zn demonstrated exceptional detection capabilities for aromatic compounds, such as aniline and nitrobenzene, at lower concentration range without interference from other components. The detection limits for these two small molecules were found to be 0.430 and 0.431 μM, respectively. Additionally, both MOFs exhibited large transient photocurrent and low impedance in electrochemical measurement. The results suggested that the photocatalytic activities of MOFs are influenced by their three-dimensional structures, which facilitate electrons passing due to the inherent semiconductor properties.

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通过双配体策略构建两种同构多功能 MOFs，实现芳香化合物检测和光催化降解性能

对于化学家来说，开发多功能、结构独特的金属有机框架（MOFs）是一项极具吸引力但又充满挑战的工作。在本研究中，我们采用双配体策略合成了两种同构的 Co/Zn MOFs：{[Co4(BMIP)3(MIP)4]-3DMF-H2O}n（SNUT-35-Co）和{[Zn4(BMIP)3(MIP)4]-2DMF-2H2O}n（SNUT-35-Zn）。利用亚甲基蓝（MB）对 SNUT-35-Co 和 SNUT-35-Zn 的光催化性能进行了评估。在紫外线/可见光照射下，SNUT-35-Co 和 SNUT-35-Zn 对甲基溴的光催化脱色率分别在 140 分钟和 120 分钟内达到 95%，表明它们具有优异的降解性能。值得注意的是，SNUT-35-Zn 在较低浓度范围内对苯胺和硝基苯等芳香族化合物具有出色的检测能力，不会受到其他成分的干扰。这两种小分子的检测限分别为 0.430 和 0.431 μM。此外，这两种 MOF 在电化学测量中都表现出较大的瞬态光电流和较低的阻抗。研究结果表明，MOFs 的光催化活性受到其三维结构的影响，由于其固有的半导体特性，三维结构有利于电子通过。

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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

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.