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Recyclable rare earth luminescence metal-organic framework new material for highly-selectively detecting trace quantity of TNT

A metal-organic framework, rare earth luminescence technology, applied in luminescent materials, 3/13 groups of organic compounds without C-metal bonds, material analysis by optical means, etc., can solve the problem of selective detection of nitroaromatic compounds. In-depth research reports, no research on fluorescence sensing and detection of nitroaromatic compounds such as TNT has been carried out, and the effect of easy promotion, simple preparation method and strong practicability has been achieved.

Inactive Publication Date: 2017-05-31
LIAOCHENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Cheng et al. have reported a case of [Ln 4 (μ 3 -OH) 4 ] 8+ The terbium luminescent metal-organic framework material with clusters as nodes, the results of fluorescence sensing and detection show that the material has good selective detection ability for small organic molecules such as benzene and acetone, but it has not been developed for nitroaromatics such as TNT. Fluorescent sensing and detection of compounds (see: Cheng P. et al., J.Phys.Chem.C 2014,118,416)
In addition, Qian et al. reported a case of europium luminescent metal-organic framework material. The results of fluorescence sensing detection showed that although the material can simply distinguish and detect nitro compounds and non-nitro compounds, it is not sensitive to TNT, 2,4-DNT and The selective detection ability of nitroaromatic compounds such as NB has not been reported in depth (see: Qian G.D. et al., Chem.Commun.2011, 47, 3153)

Method used

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  • Recyclable rare earth luminescence metal-organic framework new material for highly-selectively detecting trace quantity of TNT
  • Recyclable rare earth luminescence metal-organic framework new material for highly-selectively detecting trace quantity of TNT
  • Recyclable rare earth luminescence metal-organic framework new material for highly-selectively detecting trace quantity of TNT

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Synthesis of rare earth luminescent metal organic framework materials: Weigh 53.52mg of europium nitrate hexahydrate and 6.59mg of N-(3,5-dicarboxyphenyl)-4-carboxybenzamide ligand and dissolve in 2ml of N,N-dimethyl In a mixed solvent of formamide and 8ml of distilled water, stir well, then place the mixed solution in a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize in a synthesis oven at 120°C for 72 hours, cool to room temperature, and obtain a transparent needle crystals. The product was filtered, washed with distilled water, dried at room temperature, and collected. The yield was about 80%. The three-dimensional structure of the crystal is as figure 1 shown. Such as figure 2 As shown, the peak positions of the experimental and simulated X-ray powder diffraction of the material are basically consistent, indicating that the crystal material synthesized in the experiment has a high purity. Put the material in H 2 After soaking in...

Embodiment 2

[0051] Synthesis of rare-earth luminescent metal-organic framework materials: Weigh 26.76mg of europium nitrate hexahydrate and 6.59mg of N-(3,5-dicarboxyphenyl)-4-carboxybenzamide ligand and dissolve in 2ml of N,N-dimethyl In a mixed solvent of formamide and 8ml of distilled water, stir well, then place the mixed solution in a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize in a synthesis oven at 120°C for 72 hours, cool to room temperature, and obtain a transparent needle crystals. The product was filtered, washed with distilled water, dried at room temperature, and collected. The yield was about 63%.

Embodiment 3

[0053] Synthesis of rare-earth luminescent metal-organic framework materials: Weigh 8.92mg of europium nitrate hexahydrate and 6.59mg of N-(3,5-dicarboxyphenyl)-4-carboxybenzamide ligand and dissolve them in 2ml of N,N-dimethyl In a mixed solvent of formamide and 8ml of distilled water, stir well, then place the mixed solution in a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize in a synthesis oven at 120°C for 72 hours, cool to room temperature, and obtain a transparent needle crystals. The product was filtered, washed with distilled water, dried at room temperature, and collected. The yield was about 47%.

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Abstract

The invention relates to a recyclable rare earth luminescence metal-organic framework new material for highly-selectively detecting a trace quantity of TNT. The material is prepared from rare earth europium ions and N-(3,5-dicarboxylphenyl)-4-carboxybenzamide through a solvothermal technology, and has the characteristics of simple preparation method, high purity and good stability. The material synthesized in the invention has strong rare earth metal europium characteristic luminescence, and the fluorescence intensity of the material obviously reduces with the addition of the trace quantity of the TNT, so the high-efficiency sensing detection of the trace quantity of the TNT is realized; and a further experiment result shows that the luminescence material for detecting the TNT has the advantages of high selectivity and recyclability. The material has the advantages of simple steps, convenience in operation, and strong practicality.

Description

technical field [0001] The invention belongs to the field of rare-earth luminescent metal-organic framework materials, and in particular relates to a new recyclable rare-earth luminescent metal-organic framework material for highly selective detection of trace TNT. Background technique [0002] 2,4,6-Trinitrotoluene (TNT), as one of the most widely used single explosives in military and civil explosive fields, is a nitroaromatic explosive with strong toxic, carcinogenic and mutagenic effects , It is easy to penetrate into the soil and groundwater during its production, storage and use, which has brought great harm to the natural environment and public health. Therefore, the detection of TNT has attracted great attention from all countries. Traditional TNT detection methods mainly include ion migration method, nuclear energy detection method, scanning imaging method, surface plasmon resonance spectroscopy, electrochemical method, etc., but most of these technologies are time-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06G01N21/64
CPCC07F5/003C09K11/06C09K2211/182G01N21/643G01N2021/6432
Inventor 张庆富雷明媛徐萌史阳
Owner LIAOCHENG UNIV
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