A 2D pillared-bilayer iron-based metal–organic framework: syntheses, crystal structure, UV-light photocatalytic and heterogeneous Fenton-like catalytic activities

IF 1.6 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Transition Metal Chemistry Pub Date : 2023-02-26 DOI:10.1007/s11243-023-00522-1

Laijun Zhang, Hong Huang, Delin Li, Guocai Yuan, Yijia Li, Song Wan, Huifang Xiao, Fayun Chen, Ruyi Zou

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Abstract

A two-dimensional (2D) pillared-bilayer iron-based metal–organic framework (MOF), [Fe₂(aip)₂(bpy)₂]·(H₂O)(DMF) (1) (where H₂aip = 5-aminoisophthalic acid, bpy = 4,4'-bipyridine, DMF = N,N-dimethylformamide), was solvo/hydrothermally synthesized using H₂aip, bpy and ferrous sulfate heptahydrate as raw materials in DMF/H₂O mixed solvent. The structure and properties of 1 were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, thermogravimetric analysis, infrared spectroscopy and UV–vis diffuse reflectance spectroscopy. In 1, each Fe(II) ion exhibits a distorted octahedral geometry, while the aip²⁻ and bpy ligands adopt the chelating/bridging bis-bidentate (μ₃-η¹:η¹:η²) and bridging bidentate (μ₂-η¹:η¹) coordination modes, respectively. Infinite one-dimensional [Fe₂(aip)₂]_n chains extending along the a axis are formed through bridging and chelating carboxylate groups of aip²⁻ ligands and are further cross-linked by bpy ligands along the b axis to generate an infinite 2D pillared-bilayer framework with an interdigitated structure. Fe-MOF 1 shows both UV-light photocatalytic activity and Fenton-like catalytic activity toward the degradation of rhodamine B solution, which can be potentially applied in environmental remediation such as industrial wastewater treatment.

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一种二维柱状双层铁基金属有机骨架:合成、晶体结构、紫外光催化和非均相类芬顿催化活性

以H2aip、bpy和七水硫酸亚铁为原料，在DMF/H2O混合溶剂中，溶剂/水热合成了二维(2D)柱状双层铁基金属有机骨架[Fe2(aip)2(bpy)2]·(H2O)(DMF) (1) (H2aip = 5-氨基间苯二甲酸，bpy = 4,4′-联吡啶，DMF = N,N-二甲基甲酰胺)。采用单晶x射线衍射、粉末x射线衍射、元素分析、热重分析、红外光谱和紫外-可见漫反射光谱对1的结构和性质进行了表征。在图1中，每个Fe(II)离子呈现畸变的八面体结构，而aip2−和bpy配体分别采用螯合/桥接双齿配位模式(μ3-η1:η1:η2)和桥接双齿配位模式(μ2-η1:η1)。沿着a轴延伸的无限一维[Fe2(aip)2]n链通过aip2 -配体的羧酸基团的桥接和螯合形成，并进一步由bpy配体沿着b轴交联，形成具有交错结构的无限二维柱状双层框架。Fe-MOF 1对罗丹明B溶液的降解具有紫外光催化活性和类fenton催化活性，在工业废水处理等环境修复中具有潜在的应用前景。

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来源期刊

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.