Fluorescence color-change material capable of directionally identifying dichloromethane, trichloromethane and tetrachloromethane and preparation method of fluorescence color-change material

A color-changing material, fluorescence technology, applied in the intersection of nanomaterials and coordination chemistry, to achieve the effect of high yield, good stability and fast response speed

Active Publication Date: 2018-06-15
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of pore coordinated copolymers called clusters or microporous particles made up of two types of materials - one being rigid and another soft enough to absorb liquids like water vapor without losing their shape when exposed to certain conditions such as heating or pressure. These microparticles have unique structures with large surface areas where chemical reactions occur during excitation processes. They also display various colors depending upon how they react chemically inside these surfaces. By measuring this change caused by interactions between specific compounds attached to them, it becomes possible to determine which substances were added into harmful environments based solely on its spectral characteristics.

Problems solved by technology

The technical problem addressed in this patented text relates to finding an efficient way to label small chemical compounds like chlorofluoroethanes (CFC) without causing damage during analysis due to their strong odors that make them difficult to handle safely. Current methods involve expensive equipment such as gas chromatography columns and liquid nitrogen baths which require trained staff and consume large amounts of energy. There is currently lacking any easy-to use solution for identifying specific types of chemical substances called fluorous colloidal silicate particles (FCS).

Method used

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  • Fluorescence color-change material capable of directionally identifying dichloromethane, trichloromethane and tetrachloromethane and preparation method of fluorescence color-change material
  • Fluorescence color-change material capable of directionally identifying dichloromethane, trichloromethane and tetrachloromethane and preparation method of fluorescence color-change material
  • Fluorescence color-change material capable of directionally identifying dichloromethane, trichloromethane and tetrachloromethane and preparation method of fluorescence color-change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Synthesis of organic solvent-induced fluorescent color-changing materials

[0027] 0.02g (0.1mmol) silver tert-butylsulfide (Bu t SAg) is placed in the mixed solution of 3mL acetone and 3mL ethanol, stir rapidly; Add 0.02g (0.1mmol) silver trifluoroacetate (CF 3 COOAg), stirred until the solution was clear; 0.02 g (0.13 mmol) of phenylphosphonic acid was added, and finally 0.02 g (0.12 mmol) of 4,4'-bipyridine (bpy) was added, and stirring was continued for 5 minutes. After the reaction, the solution was evaporated at room temperature in the dark, and after 3 days, about 20 mg of light yellow blocky crystals were obtained, 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.

Embodiment 2

[0028] Embodiment 2: The material of the present invention recognizes and detects the phenomenon of organic solvents

[0029] Get the organic solvent-induced fluorescent color-changing material sample prepared in Example 1, under the irradiation of a 365nm ultraviolet lamp, drop CH on the material respectively 2Cl 2 , CHCl 3 , CCl 4 , the fluorescent colors of the materials are green, orange, and yellow-green, respectively. From Figure 4 and 5 It can be seen that the material realizes the detection of these three solvents and can be identified by naked eyes.

Embodiment 3

[0030] Embodiment 3: Fluorescence spectrometry and solvent adsorption test for organic solvent identification of the material of the present invention.

[0031] Get 20mg of the organic solvent-induced fluorescent color-changing material powder sample that embodiment 1 makes, pack in the fluorescent test solid sample tank, drop 25 μ L organic solvent (CH 2 Cl 2 , CHCl 3 , CCl 4 , wet the material completely), measure its fluorescence spectrum (excitation wavelength 365nm). The fluorescence maximum emission peak wavelength of the material of the present invention is different under different organic solvents. Compared with dichloromethane, chloroform and carbon tetrachloride have a better stabilizing effect on the excited state of the material, so the fluorescence emission position is red-shifted. Under the action of methyl chloride, the fluorescence emission position of the material does not change compared with its own fluorescence emission position. After the organic solv...

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Abstract

The invention discloses a novel fluorescence color-change material capable of directionally identifying CH2Cl2, CHCl3 and CCl4 and a preparation method of a fluorescence color-change material and belongs to the cross fields of nano-materials and coordination chemistry. The material is a silver and sulfur cluster based porous coordination polymer which takes a 10-core silver and sulfur cluster as anode and has double teeth bridged through an organic ligand. A chemical formula of the compound is as follows: [Ag10(StBu)6(CF3COO)2(PhPO3H)2(bpy)2]n. The novel fluorescence color-change material belongs to a triclinic crystal system and a space group is P-1. The material can be used for directionally identifying CH2Cl2, CHCl3 and CCl4 organic solvents and the porosity reaches maximum value of 32percent from 9.8 percent; the material has high sensitivity and a rapid response speed, and has the characteristics of long detection service life, capability of being circularly utilized, good stability and the like. The material has a huge application prospect in the aspects of organic solvent identification and detection.

Description

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Claims

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Application Information

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Owner HENAN POLYTECHNIC UNIV
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