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Application of a Mercapto Silver Cluster Coordination Polymer in the Detection of Organic Solvents

A technology of coordination polymer and organic solvent, applied in the intersection of nanomaterials and coordination chemistry, can solve the problems of strong carcinogenicity and human harm, and achieve the effect of long detection life, low cost and good promotion value.

Active Publication Date: 2019-01-08
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most organic solvents are volatile, soluble and flammable, and harmful to human body, even some organic solvents such as: benzene, carbon tetrachloride, 1,2-dichloroethane, etc. have strong carcinogenicity

Method used

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  • Application of a Mercapto Silver Cluster Coordination Polymer in the Detection of Organic Solvents
  • Application of a Mercapto Silver Cluster Coordination Polymer in the Detection of Organic Solvents
  • Application of a Mercapto Silver Cluster Coordination Polymer in the Detection of Organic Solvents

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Effect test

Embodiment 1

[0025] Embodiment 1: the synthesis of polymer material of the present invention

[0026] 0.338mL (3mmol) tert-butyl mercaptan (Bu t SH) was dissolved in a mixed solution of 15mL acetonitrile and 15mL ethanol, and stirred rapidly; adding 0.9g (4mmol) silver trifluoroacetate (CF 3 COOAg), stirred until the solution was clear; then added trifluoroacetic acid to adjust the pH to 2–3, and finally added 0.5 g (3 mmol) of 4,4’-bipyridine (bpy), and continued to stir for 10 minutes. After the reaction, the solution was evaporated at room temperature in the dark, and about 1 g of colorless massive crystals was obtained after 3 days, with a yield of 75%. After filtering, washing with ethanol, and drying at room temperature, an organic solvent-induced fluorescent color-changing material was obtained. Its porosity is 21.64%.

Embodiment 2

[0027] Embodiment 2: The polymer material of the present invention recognizes and detects organic solvents

[0028] Taking the polymer material sample of the present invention prepared in Example 1, under the irradiation of a 365nm ultraviolet lamp, organic solvents of different polarities were added dropwise to the material, and the fluorescent color of the material changed from bright green to orange red. from Image 6 with 7 It can be seen that this material can be recognized by naked eyes in the detection of organic solvents.

Embodiment 3

[0029] Embodiment 3: polymer organic solvent identification fluorescence spectrometry of the present invention

[0030] Take 20 mg of the polymer powder sample of the present invention prepared in Example 1, put it into a solid sample tank for fluorescence testing, add 30 μL of organic solvent dropwise on the sample (wet the material completely), and measure its fluorescence spectrum (excitation wavelength 365nm). The maximum fluorescence emission peak wavelength of the polymer material of the present invention red shifts with the increase of solvent polarity. and the E of the organic solvent T The value of (30) has a linear relationship with the fluorescence maximum emission wavelength of the polymer material containing the present invention. After the organic solvent in the sample evaporates to dryness, measure its solvent-free fluorescence spectrum. In this way, in the cycle of adding solvent and volatilizing solvent, measure its fluorescence spectrum to prove its stabili...

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Abstract

The invention discloses application of a sulfydryl silver cluster coordination polymer in organic solvent detection, and belongs to the cross field of nanometer materials and coordination chemistry. The polymer is a silver / sulfur cluster-based porous coordination polymer with the 12-core silver / sulfur cluster as the node and bridged with a bi-toothed organic ligand. The chemical formula of the compound is [(Ag12(SBu(i)t( / i))8(CF3COO)4(bpy)4)](i)n( / i). The material has amphiphilic ducts and has high capacity for adsorbing small solvent molecules. The solvent molecules in the ducts interact with the ligand to affect the excited state energy level of the material, so that the fluorescent performance of the material changes in different polar solvents. Excellent linear relation exists between the solvent polarity and the fluorescence maximum emission peak wavelength of the material. Therefore, organic solvents can be recognized and detected according to fluorescence spectra. The silver / sulfur cluster-based porous coordination polymer has the advantages of being free of invasion and high in sensitivity and safety and has good application prospects in organic solvent recognition and detection.

Description

technical field [0001] The invention belongs to the intersection field of nanometer materials and coordination chemistry, and specifically relates to a mercapto-silver cluster coordination polymer and its application in organic solvent detection. Background technique [0002] Most organic solvents are volatile, soluble and flammable, and harmful to human body, even some organic solvents such as: benzene, carbon tetrachloride, 1,2-dichloroethane, etc. have strong carcinogenicity. Therefore, a miniaturized, low-cost, safe and reliable organic solvent identification and detection device has great commercial value. In recent years, the development of an organic solvent identification and detection material with fast response, good stability, high sensitivity and wide recognition range is the goal pursued by chemists. Fluorescent color-changing organic solvent detection materials have attracted attention in the fields of materials science and chemistry due to their non-invasiven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N23/20C08G83/00
CPCC08G83/008G01N21/643G01N23/20
Inventor 臧双全吴晓辉韦永莉董喜燕黄仁武魏永生
Owner ZHENGZHOU UNIV
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