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Application of a water-soluble fluorescent conjugated polymer in the detection of nitroaromatics

A technology of conjugated polymers and nitroarenes, which is applied in the application field of water-soluble fluorescent conjugated polymers in the detection of nitroarenes, can solve the problems of difficulty in the detection of nitroarenes, and achieve excellent solubility and improved sensitivity. , the effect of increasing the fluorescence intensity

Inactive Publication Date: 2018-07-03
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluorescent conjugated polymers currently reported for the detection of nitroaromatics are mostly hydrophobic polymers, which are generally used for the detection of nitroaromatics in the gas phase, but it is difficult to meet the requirements for the detection of nitroaromatics in water.

Method used

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  • Application of a water-soluble fluorescent conjugated polymer in the detection of nitroaromatics
  • Application of a water-soluble fluorescent conjugated polymer in the detection of nitroaromatics
  • Application of a water-soluble fluorescent conjugated polymer in the detection of nitroaromatics

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Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1 A kind of preparation method of water-soluble fluorescent conjugated polymer

[0053] The preparation process of water-soluble fluorescent conjugated polymer P is as follows: figure 1 Shown:

[0054] (1) Synthesis of monomer M

[0055] Dissolve 3,6-dibromocarbazole (1.63g, 5mmol), potassium hydroxide (1g, 17.8mmol), tetrabutylammonium bromide (0.05g, 0.155mmol) in 40mL of DMF respectively, and stir for 20min , Ethyl chloroacetate (1.23 g, 10 mmol) was added, the whole mixed solution was heated and stirred at 85° C. for 20 h, cooled to room temperature, and filtered to obtain a mixed filtrate. Sodium hydroxide (0.8g, 20mmol) was made into 5mL aqueous solution, added to the filtrate, heated and stirred at 85°C for 5h, the reaction solution was poured into 400mL distilled water and filtered to obtain the filtrate. The filtrate was adjusted to pH 2-3 with concentrated hydrochloric acid to give a white solid, which was dried in vacuo. The solid product M was...

Embodiment 2

[0061] Embodiment 2 A kind of preparation method of water-soluble fluorescent conjugated polymer, comprises the following steps:

[0062] (1) Synthesis of monomer M

[0063] Dissolve 3,6-dichlorocarbazole (1.1805g, 5mmol), potassium hydroxide (1g, 17.8mmol), tetrabutylammonium bromide (0.05g, 0.155mmol) in 40mL of DMF respectively, and stir for 20min , Ethyl bromoacetate (1.23 g, 7.365 mmol) was added, the whole mixed solution was heated and stirred at 85° C. for 20 h, cooled to room temperature, and filtered to obtain a mixed filtrate. Sodium hydroxide (0.8g, 20mmol) was made into 5mL aqueous solution, added to the filtrate, heated and stirred at 87°C for 5.5h, the reaction solution was poured into 400mL distilled water and filtered to obtain the filtrate. The filtrate was adjusted to pH 2-3 with concentrated hydrochloric acid to give a white solid, which was dried in vacuo. The solid product, monomer M, was obtained in about 90% yield. 1 H NMR: (DMSO-d 6 ,400MHz), δ(ppm)...

Embodiment 3

[0068] Embodiment 3 A kind of preparation method of water-soluble fluorescent conjugated polymer, comprises the following steps:

[0069] (1) Synthesis of monomer M

[0070] Dissolve 3,6-dibromocarbazole (1.793g, 5.5mmol), potassium hydroxide (1.124g, 20mmol), and tetrabutylammonium bromide (0.064g, 0.2mmol) in 40mL of DMF respectively, and stir for 20min Finally, ethyl chloroacetate (1.23 g, 10 mmol) was added, and the whole mixed solution was heated and stirred at 83° C. for 20 h, then cooled to room temperature, and filtered to obtain a mixed filtrate. Sodium hydroxide (0.8g, 20mmol) was made into 5mL aqueous solution, added to the filtrate, heated and stirred at 85°C for 5h, the reaction solution was poured into 400mL distilled water and filtered to obtain the filtrate. The filtrate was adjusted to pH 2-3 with concentrated hydrochloric acid to give a white solid, which was dried in vacuo. The solid product obtained was monomer M with a yield of about 90%. 1 H NMR: (DMSO...

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Abstract

The invention discloses application of a water-soluble fluorescent conjugated polymer to the detection of a nitroaromatic hydrocarbon. The structural formula of the polymer is as shown by a formula 1 which is as defined in the description. The specific water-soluble fluorescent conjugated polymer which is provided by the invention has favorable application to the detection of the nitroaromatic hydrocarbon by serving as a sensor. The water-soluble fluorescent conjugated polymer contains a water-soluble group; the water-soluble fluorescent conjugated polymer comprises two parts, wherein one part is a carbazole conjugated backbone existing in a form of a pi-pi conjugated system, so as to guarantee the optical property of the polymer; the other part contains a polyhydric water-soluble group, so as to meet the solubility, in a water phase, of the polymer. A polymer chain can be completely and uniformly dispersed in a water-phase environment; the direct contact between an analyte and the polymer is facilitated; the signal magnification effect of the polymer is realized.

Description

technical field [0001] The invention specifically relates to the application of a water-soluble fluorescent conjugated polymer in the detection of nitroaromatics. Background technique [0002] As a new class of polymer materials, water-soluble conjugated polymers have attracted much attention in recent years. Due to the characteristic of being able to disperse uniformly in the water phase, water-soluble conjugated polymers are widely used in various fields. However, there are few reports on the use of water-soluble conjugated polymers for the detection of nitroaromatics in water. [0003] Nitroaromatic compounds (trinitrotoluene TNT, dinitrotoluene DNT) are important components of explosives, and nitroaromatics are also harmful to human health. Therefore, it is of great significance to explore the on-site detection technology of micro-trace nitroaromatics for people's life and property safety and environmental protection. In reality, there are many studies on nitroaromati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12C09K11/06G01N21/64
CPCC08G61/124C08G2261/124C08G2261/1432C08G2261/18C08G2261/228C08G2261/312C08G2261/3241C08G2261/354C08G2261/522C08G2261/94C09K11/06C09K2211/1466G01N21/643G01N2021/6432
Inventor 崔月芝苏熙陶芙蓉李天铎李艳
Owner QILU UNIV OF TECH
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