A stable 3D Cd(<scp>ii</scp>) metal–organic framework for highly sensitive detection of Cu<sup>2+</sup>ions and nitroaromatic explosives

Du, Jian-Long; Gao, Ju-Ping; Li, Chao-Ping; Zhang, Xiaoying; Hou, Jin-Xin; Xu, Jing; Mu, Yajuan; Li, Lijun

doi:10.1039/c7ra08977e

Cited by 25 publications

(8 citation statements)

References 45 publications

(38 reference statements)

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“…The emission of HNU-50 shows a blue shift (31 nm) compared with that of PMA, which may be caused by the coordination of ligand to metal centers (Figure S6). Considering the Lewis acid-basic effect between the framework and U(VI), the detection of U(VI) by monitoring the fluorescence change of HNU-50 in solution was performed. As exhibited in Figure A, with the increase of U(VI) concentration, the fluorescence of HNU-50 decreased gradually, and 70% of the fluorescence intensity was quenched at the concentration of 10 –3 M. Figure B shows the relationship of U(VI) concentration and intensity (( I 0 – I )/ I 0 ), where I 0 is the measured luminous intensity of HNU-50 at 417 nm, and I is the fluorescence intensity of HNU-50 in solution with a given U(VI) concentration at 417 nm.…”

Section: Results and Discussionmentioning

confidence: 99%

A Zinc Metal–Organic Framework for Concurrent Adsorption and Detection of Uranium

Qin

Yang

et al. 2020

Inorg. Chem.

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Uranium is one of the principal raw materials in the nuclear industry, but if released into the natural environment, it also poses latent health risks to mankind. Therefore, there is an urgent need to develop a strategy that can concurrently detect and adsorb uranium to realize the sustainable development of nuclear power and protect the environment. In this work, a fluorescent zinc-based metal–organic framework (HNU-50) was designed and synthesized for the effective detection and extraction of U(VI). The amide groups on N-pyridin-4-ylpyridine-4-carboxamide ligands and two uncoordinated carboxyl oxygen atoms on pyromellitic acid ligands in HNU-50 provide potential uranium-binding sites. Consequently, HNU-50 is competent of selectively and efficiently catching uranyl ions, achieving an optimum adsorption capacity of 632 mg/g. Additionally, the adsorption of U(VI) results in fluorescence quenching of HNU-50, thus allowing sensitive and selective detection of U(VI) by fluorescence change. Note that HNU-50 exhibits a considerably low detection limit of 1.2 × 10–8 M for U(VI) in aqueous solution, which is below the World Health Organization maximum pollution standards for potable water (6.3 × 10–8 M).

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Section: Results and Discussionmentioning

confidence: 99%

A Zinc Metal–Organic Framework for Concurrent Adsorption and Detection of Uranium

Qin

Yang

et al. 2020

Inorg. Chem.

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“…Degradation of MB was also studied. In the presence of [126]. The free ligand showed emission at ~420 nm upon excitation at 356 nm.…”

Section: Carbazole Derivativesmentioning

confidence: 99%

Coordination Polymers Based on Highly Emissive Ligands: Synthesis and Functional Properties

et al. 2020

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Coordination polymers are constructed from metal ions and bridging ligands, linking them into solid-state structures extending in one (1D), two (2D) or three dimensions (3D). Two- and three-dimensional coordination polymers with potential voids are often referred to as metal-organic frameworks (MOFs) or porous coordination polymers. Luminescence is an important property of coordination polymers, often playing a key role in their applications. Photophysical properties of the coordination polymers can be associated with intraligand, metal-centered, guest-centered, metal-to-ligand and ligand-to-metal electron transitions. In recent years, a rapid growth of publications devoted to luminescent or fluorescent coordination polymers can be observed. In this review the use of fluorescent ligands, namely, 4,4′-stilbenedicarboxylic acid, 1,3,4-oxadiazole, thiazole, 2,1,3-benzothiadiazole, terpyridine and carbazole derivatives, naphthalene diimides, 4,4′,4′′-nitrilotribenzoic acid, ruthenium(II) and iridium(III) complexes, boron-dipyrromethene (BODIPY) derivatives, porphyrins, for the construction of coordination polymers are surveyed. Applications of such coordination polymers based on their photophysical properties will be discussed. The review covers the literature published before April 2020.

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“…Du et al [138] reported a 3D Cd(II) MOFs, constructed abundant carboxylate groups which can bind the metal ions by coordination. Cu 2+ could quench the fluorescent in water, and the color of MOFs was transformed from yellow to green by visual inspection, which improved the accuracy of the test results.…”

Section: Heavy Metal Detectionmentioning

confidence: 99%

Recent Progress on Luminescent Metal-Organic Framework-Involved Hybrid Materials for Rapid Determination of Contaminants in Environment and Food

et al. 2020

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The high speed of contaminants growth needs the burgeoning of new analytical techniques to keep up with the continuous demand for monitoring and legislation on food safety and environmental pollution control. Metal-organic frameworks (MOFs) are a kind of advanced crystal porous materials with controllable apertures, which are self-assembled by organic ligands and inorganic metal nodes. They have the merits of large specific surface areas, high porosity and the diversity of structures and functions. Latterly, the utilization of metal-organic frameworks has attracted much attention in environmental protection and the food industry. MOFs have exhibited great value as sensing materials for many targets. Among many sensing methods, fluorometric sensing is one of the widely studied methods in the detection of harmful substances in food and environmental samples. Fluorometric detection based on MOFs and its functional materials is currently one of the most key research subjects in the food and environmental fields. It has gradually become a hot research direction to construct the highly sensitive rapid sensors to detect harmful substances in the food matrix based on metal-organic frameworks. In this paper, we introduced the synthesis and detection application characteristics (absorption, fluorescence, etc.) of metal-organic frameworks. We summarized their applications in the MOFs-based fluorometric detection of harmful substances in food and water over the past few years. The harmful substances mainly include heavy metals, organic pollutants and other small molecules, etc. On this basis, the future development and possible application of the MOFs have prospected in this review paper.

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A stable 3D Cd(ii) metal–organic framework for highly sensitive detection of Cu²⁺ions and nitroaromatic explosives

Abstract: A Cd(ii) coordination polymer, [Cd3(L)2(H2O)5]·(H2O)4(1) (H3L= 9-(4-carboxy-phenyl)-9H-carbazoly-3,6-dicarboxylic acid) has been synthesized solvothermally.

Cited by 25 publications

References 45 publications

A Zinc Metal–Organic Framework for Concurrent Adsorption and Detection of Uranium

A Zinc Metal–Organic Framework for Concurrent Adsorption and Detection of Uranium

Coordination Polymers Based on Highly Emissive Ligands: Synthesis and Functional Properties

Recent Progress on Luminescent Metal-Organic Framework-Involved Hybrid Materials for Rapid Determination of Contaminants in Environment and Food

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A stable 3D Cd(ii) metal–organic framework for highly sensitive detection of Cu2+ions and nitroaromatic explosives

Abstract: A Cd(ii) coordination polymer, [Cd3(L)2(H2O)5]·(H2O)4(1) (H3L= 9-(4-carboxy-phenyl)-9H-carbazoly-3,6-dicarboxylic acid) has been synthesized solvothermally.

Cited by 25 publications

References 45 publications

A Zinc Metal–Organic Framework for Concurrent Adsorption and Detection of Uranium

A Zinc Metal–Organic Framework for Concurrent Adsorption and Detection of Uranium

Coordination Polymers Based on Highly Emissive Ligands: Synthesis and Functional Properties

Recent Progress on Luminescent Metal-Organic Framework-Involved Hybrid Materials for Rapid Determination of Contaminants in Environment and Food

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A stable 3D Cd(ii) metal–organic framework for highly sensitive detection of Cu²⁺ions and nitroaromatic explosives