钬基金属有机框架的合成与表征

IF 2.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

CrystEngComm Pub Date : 2024-09-13 DOI:10.1039/D4CE00592A

Muhammad Abbas, Murtaza Degani, Simin Sheybani, Tejas Shah, Monu Joy and Kenneth J. Balkus

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引用次数: 0

摘要

钬基金属有机框架（MOFs）因其潜在的生物医学和放射治疗应用而极具吸引力。本研究制备了两种由钬（III）和 3,3′,5,5′-偶氮苯四甲酸酯（H4abtc）组成的新型三维 MOF。化学式为[Ho2(abtc)1.5(DMF)4]-DMF的微孔Ho(III)双核MOF（Ho2-abtc）呈现出三维框架。基于六簇（RE6X8）的三维 MOF 的化学式为（[Ho6(abtc)3(μ3-X)8]-DMA；X = OH-/F-，DMA = 二甲基铵），显示出由 OH-F- 离子桥接的 Ho6 簇。钬 MOFs 中六簇的存在为设计高钬含量的新型钬传输 MOFs 提供了可能。研究人员解决了 MOFs 的晶体结构问题。单晶 X 射线衍射 (SC-XRD)、粉末 XRD、扫描电子显微镜 (SEM)、能量色散光谱 (EDS)、19F 核磁共振 (NMR)、热重分析 (TGA)、气体吸附分析和 X 射线光电子能谱 (XPS) 对这些 MOFs 进行了表征。

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Synthesis and characterization of holmium based metal–organic frameworks†

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Synthesis and characterization of holmium based metal–organic frameworks†

Holmium based metal–organic frameworks (MOFs) are attractive due to their potential biomedical and radiotherapeutic applications. Two new three-dimensional MOFs consisting of holmium(III) and 3,3′,5,5′-azobenzenetetracarboxylate (H₄abtc) were prepared. The microporous Ho(III) binuclear MOF (Ho₂-abtc) with the chemical formula of [Ho₂(abtc)_1.5(DMF)₄]·DMF exhibited a three-dimensional framework. A hexacluster (RE₆X₈) based three-dimensional MOF with the chemical formula ([Ho₆(abtc)₃(μ₃-X)₈]·DMA; X = OH⁻/F⁻, DMA = dimethyl ammonium) exhibited Ho₆ clusters bridged by OH⁻/F⁻ ions. The presence of hexaclusters in the holmium MOFs opens up the design of new MOFs for the holmium delivery with high holmium content. The crystal structures of the MOFs were solved. These MOFs are characterized by single-crystal X-ray diffraction (SC-XRD), powder XRD, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), ¹⁹F nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), gas adsorption analysis, and X-ray photoelectron spectroscopy (XPS).