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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >One cadmium (II)-based metal-organic framework as high-efficiency multi-functional fluorescence chemosensor targeting for the determination of Fe3+, Cr2O72- and CrO42- in aqueous phase
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One cadmium (II)-based metal-organic framework as high-efficiency multi-functional fluorescence chemosensor targeting for the determination of Fe3+, Cr2O72- and CrO42- in aqueous phase

机译：基于镉（II）的金属有机框架，作为高效多功能荧光化学传感器靶向Fe3 +，Cr2O72和CRO42-水相的测定

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Excessive discharge of metal ions, such as Fe3+ and Cr2O72-/CrO42- may bring about potential threats to human health and the ecological environment. Consequently, the assembly of function-oriented materials as effective chemosensors has the vital practical significance. In this article, four metal-organic frameworks (MOFs), namely, {[Co(bptb)(0.5)(bibp)(H2O)(2)]center dot H2O}(n)(I), [Mn-4(bptb)(2)(bibp)(3)(H2O)(4)](n)(II), [Ni-2(bptb)(bipy)(2)(H2O)(3)](n)(III) and [Cd-3(bptb)(2)(bipb)(3)(H2O)(4)](n) (IV) (H(4)bptb = 2,4,4',6-biphenyl tetracarboxylic acid, bibp = 4,4'-bis (imidazolyl) biphenyl, and bipy = 4,4'-bipyridine) have been hydrothermally synthesized, and their structures and physicochemical properties have been characterized and investigated. Single-crystal X-ray diffraction analysis reveals that they present fascinating three-dimensional configurations. Powder X-ray diffraction as well with ther-mogravimetric analysis demonstrates that Cd-MOF (IV) exhibits a high chemical and thermal stability. The studies of fluorescence properties show that IV may serve as a multi-responsive sensor for Fe3+ and Cr2O72-/ CrO42- ions with high sensitivity, selectivity and efficiency. Moreover, the fluorescence quenching mechanisms have been studied systematically depend on the inductively coupled plasma-atomic emission spectrometer (ICP-AES), X-ray photoelectron spectroscopy (XPS) analyses, PXRD analysis, FT-IR spectra, UV-vis spectra and SEM mapping (scanning electron microscope). In addition, magnetic and cyclic voltammetry (CV) properties of I-III have also been investigated. (C) 2021 Elsevier B.V. All rights reserved.
机译：Fe3+和Cr2O72-/CrO42-等金属离子的过量排放可能对人类健康和生态环境造成潜在威胁。因此，将功能导向材料组装成有效的化学传感器具有重要的现实意义。本文合成了四种金属有机骨架（MOF），即[Co（bptb）（0.5）（bibp）（H2O）（2）]中心点H2O}（n）（I），[Mn-4（bptb）（2）（bibp）（3）（H2O）（4）]（n）（II），[Ni-2（bptb）（bipy）（2）（H2O）（3）]（n）（III）和[Cd-3（bptb）（2'-bipb）（3）（H2O）（4）]（n）（IV）（H（4）bptb=2,4,4'，6-联苯四甲酸，bibp=4,4'-bibp=4'-bipy）联吡啶和联吡啶联吡啶，并对其结构和理化性质进行了表征和研究。单晶X射线衍射分析表明，它们呈现出迷人的三维结构。粉末X射线衍射和热重分析表明，Cd-MOF（IV）具有很高的化学稳定性和热稳定性。荧光性质的研究表明，IV可以作为Fe3+和Cr2O72-/CrO42-离子的多响应传感器，具有高灵敏度、高选择性和高效率。此外，通过电感耦合等离子体原子发射光谱仪（ICP-AES）、X射线光电子能谱（XPS）分析、PXRD分析、FT-IR光谱、紫外-可见光谱和扫描电子显微镜（SEM）图谱，系统地研究了荧光猝灭机理。此外，还研究了I-III的磁性和循环伏安（CV）性质。（c）2021爱思唯尔B.V.保留所有权利。

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