Europium rare earth metal-organic frame material and preparation method and application thereof

A metal-organic framework and organic framework technology, which is applied in the fields of analytical materials, luminescent materials, and material excitation analysis, can solve the problems of cumbersome operation and low sensitivity, and achieve the effects of simple preparation process, low cost, and mild reaction conditions

Inactive Publication Date: 2017-05-17
NANKAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Pentachlorobenzene and hexachlorobenzene are typical persistent organic pollutants, but the methods currently used to detect polychlorobenzene, such as gas chromatography, are cumbersome to operate and have low sensitivity

Method used

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  • Europium rare earth metal-organic frame material and preparation method and application thereof
  • Europium rare earth metal-organic frame material and preparation method and application thereof
  • Europium rare earth metal-organic frame material and preparation method and application thereof

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Embodiment

[0026] A kind of europium rare earth metal-organic framework material, the chemical formula is {[Eu 2 (L) 3 (DMF) 2 ]} n , where: n is a natural number from 1 to positive infinity, L is 5-(4 hydrogen-1,2,4-triazole)-4-benzene-1,3-dicarboxylic acid ion, DMF is N,N - dimethylformamide; the metal organic framework material is composed of rare earth metal ions Eu 3+ It forms a three-dimensional network structure through coordination bonds with organic ligands, in which the organic ligand is 5-(4-hydrogen-1,2,4-triazole)-4-benzene-1,3-dicarboxylic acid; in the unit cell Contains a crystallographically independent Eu 3+ ion, three-half ligand L 2- and a coordinated DMF molecule; Eu 3+ ions through the ligand L 2- Bridge to form a one-dimensional chain structure; then through L 2- The further connection of the ligands forms a three-dimensional network structure.

[0027] The preparation method of the europium rare earth metal organic framework material comprises the followin...

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Abstract

The invention relates to a europium rare earth metal-organic frame material and a preparation method and application thereof. The chemical formula of the product is {[Eu2(L)3(DMF)2]}n. The preparation method comprises the following steps: adding 5-(4-hydroxy-1,2,4-triazolyl)-4-benzene-1,3-dicarboxylic acid and europium chloride hexahydrate into a mixed solution of methanol and DMF, and stirring uniformly to obtain a mixed solution; then charging the mixed solution into a polytetrafluoroethylene lined hydrothermal synthesis high-pressure reaction kettle, cooling and filtering after reaction to obtain colorless bulk crystals; and then repetitively washing the colorless bulk crystals with the mixed solution of methanol and DMF to obtain the metal organic frame material. The europium rare earth metal-organic frame material has the advantages of simple preparation process, mild reaction conditions, high yield and low cost; and at room temperature, chlorobenzene, 1,2-dichlorobenzene, 1,2,4-trichlorobenzene, 1,2,3,4-tetrachlorobenzene, 1,2,4,5-tetrachlorobenzene, pentachlorobenzene and hexachlorobenzene have different degrees of fluorescence quenching responses on the material, and the material has good application prospects in environmental monitoring.

Description

technical field [0001] The invention relates to the technical field of metal-organic framework materials, in particular to a preparation method and application of lanthanide metal-organic framework materials. Background technique [0002] Persistent Organic Pollutants (POPs) refer to chemical substances synthesized by humans that can persist in the environment, accumulate through the biological food chain, and cause harmful effects on human health. It has four characteristics: high toxicity, persistence, bioaccumulation, and long-distance migration, and humans at the top of the biological chain have amplified these toxicity to 70,000 times. Pentachlorobenzene and hexachlorobenzene are typical persistent organic pollutants, but the methods currently used to detect polychlorobenzene, such as gas chromatography, are cumbersome to operate and have low sensitivity. It is a new attempt to use metal-organic frameworks as fluorescent probes to detect organic pollutants. Metal-orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/182G01N21/643G01N2021/6432
Inventor 师唯王璐程鹏
Owner NANKAI UNIV
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