Fabrication of two 3D Ln-MOFs as highly sensitive luminescent sensors for Fe3+ and Cr3+ ions

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Journal of Solid State Chemistry Pub Date : 2024-08-30 DOI:10.1016/j.jssc.2024.124988

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Abstract

Two new isostructural lanthanide(III)−metal organic frameworks (Ln-MOFs), namely [Ln₂(FDA)₃(TMS)₂(H₂O)₂]·H₂O (Ln = Eu 1 and Tb 2, H₂FDA = 2,5-furandicarboxylic acid, TMS = tetramethylene sulfone), have been synthesized and characterized. Single-crystal X-ray diffraction analysis reveals that both Ln-MOFs exhibit three-dimensional structures crystallizing in the monoclinic C2/c space group. Luminescent sensing studies indicate that 1 and 2 possess commendable capabilities for detecting Fe³⁺ and Cr³⁺, with low detection limits of 20.00 nM and 43.41 nM for 1 and 66.10 nM and 0.37 μM for 2, respectively. Furthermore, the investigation into the mechanism revealed the quenching of Fe³⁺ can be ascribed to the dual effects of inner filter effect (IFE) and the static quenching. Conversely, the dynamic quenching mechanism has played a predominant role during the sensing process of Cr³⁺.

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制备两种三维 Ln-MOFs 作为高灵敏度的 Fe3+ 和 Cr3+ 离子发光传感器

我们合成并表征了两种新的等结构镧系元素（III）-金属有机框架（Ln-MOFs），即[Ln2(FDA)3(TMS)2(H2O)2]-H2O（Ln = Eu 1 和 Tb 2，H2FDA = 2,5-呋喃二甲酸，TMS = 四亚甲基砜）。单晶 X 射线衍射分析表明，这两种 Ln-MOF 都呈现出单斜 C2/c 空间群结晶的三维结构。发光传感研究表明，1 号和 2 号具有检测 Fe3+ 和 Cr3+ 的出色能力，其检测限分别为 20.00 nM 和 43.41 nM，2 号为 66.10 nM 和 0.37 μM。此外，对机理的研究还发现，Fe3+ 的淬灭可归因于内部滤波效应（IFE）和静态淬灭的双重作用。相反，动态淬火机制在 Cr3+ 的感应过程中发挥了主要作用。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.