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Fluorescent conjugated polymer silicon oxide nanoparticle preparation method and application thereof

A technology of conjugated polymers and nanoparticles, applied in the field of chemical sensing materials, can solve problems such as threats to national security, and achieve the effects of increasing specific surface area, improving detection sensitivity, and high-sensitivity detection

Inactive Publication Date: 2009-12-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, terrorist activities have been rampant in recent years. Using explosives to carry out terrorist attacks is a common method of terrorists, which seriously threatens national security.

Method used

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  • Fluorescent conjugated polymer silicon oxide nanoparticle preparation method and application thereof
  • Fluorescent conjugated polymer silicon oxide nanoparticle preparation method and application thereof
  • Fluorescent conjugated polymer silicon oxide nanoparticle preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1, preparation of polyphenylene acetylene oxide silica nanoparticles

[0036]1) Dissolve 50mg of 4-iodo-N-(3-trimethoxysilylpropyl)benzamide in 5mL of tetrahydrofuran, slowly add dropwise to 10mL of anhydrous toluene dispersed with 200mg of silicon oxide nanoparticles, and Reflux at 110°C for 20 hours in the atmosphere. The reaction solution was centrifuged at high speed, and the resulting precipitate was washed with anhydrous toluene, tetrahydrofuran, and N,N-dimethylformamide in sequence, and finally dispersed into 12 mL of N,N-dimethylformamide for later use.

[0037] 2) Mix 6 mL of the N,N-dimethylformamide dispersion of the modified silica nanoparticles prepared in 1), 0.2 mmol of diethynylbenzene, 0.2 mmol of 2,5-diiodo-1,4 - Bis(3-sulfopropyl) benzene, 1 mg cuprous iodide, 4 mg bis(triphenylphosphine) palladium dichloride were added to the reactor under the protection of argon, and then 30 mL of deoxygenated N, N -Dimethylformamide, 20 mL of triethyl...

Embodiment 2

[0038] Embodiment 2, preparation of polyphenylene acetylene oxide silica nanoparticles

[0039] 1) Dissolve 200mg of 4-iodo-N-(3-trimethoxysilylpropyl)benzamide in 15mL of tetrahydrofuran, and slowly add dropwise to 100mL of anhydrous toluene dispersed with 200mg of silicon oxide nanoparticles. Reflux at 110°C for 20 hours in the atmosphere. The reaction solution was centrifuged at high speed, and the resulting precipitate was washed with anhydrous toluene, tetrahydrofuran, and N,N-dimethylformamide in sequence, and finally dispersed into 12 mL of N,N-dimethylformamide for later use.

[0040] 2) Mix 6mL of N,N-dimethylformamide dispersion of modified silica nanoparticles prepared in 1), 15mmol of diethynylbenzene, 15mmol of 2,5-diiodo-1,4-di (3-sulfopropyl)benzene, 15mg cuprous iodide, 150mg bis(triphenylphosphine)palladium dichloride were added to the reactor under the protection of argon, and then 70mL N, N-dimethyl Dimethyl formamide, 50 mL of triethylamine and 60 mL of w...

Embodiment 3

[0041] Embodiment 3, the preparation of polyphenylene acetylene oxide silica nanoparticles

[0042] 1) Dissolve 83mg of 4-iodo-N-(3-trimethoxysilylpropyl)benzamide in 5mL of tetrahydrofuran, and slowly add dropwise to 10mL of anhydrous toluene dispersed with 200mg of silicon oxide nanoparticles. Reflux at 110°C for 20 hours in the atmosphere. The reaction solution was centrifuged at high speed, and the resulting precipitate was washed with anhydrous toluene, tetrahydrofuran, and N,N-dimethylformamide in sequence, and finally dispersed into 12 mL of N,N-dimethylformamide for later use.

[0043] 2) Mix 6 mL of the N,N-dimethylformamide dispersion of the modified silica nanoparticles prepared in 1), 0.2 mmol of diethynylbenzene, 0.2 mmol of 2,5-diiodo-1,4 -Bis (3-sulfopropyl) benzene, 4.5 mg cuprous iodide, 11.2 mg bis (triphenylphosphine) palladium dichloride was added to the reactor under the protection of argon, and then 50 mL of deoxygenated N , N-dimethylformamide, 30mL tr...

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Abstract

The invention discloses a fluorescent conjugated polymer silicon oxide nanoparticle preparation method and an application thereof. In the method, the silicon oxide nanoparticle is used as nucleus, decorated with 4-iodo-benzo on the surface, and initiated to perform polymerization to have fluorescent conjugated polymer grafted on the surface. The preparation method comprises the two following steps: firstly, decorating the surface of the silicon oxide nanoparticle with 4-iodobenzene; secondly, initiating aromatic alkynyl benzene and aromatic monomer containing sulfonic acid side chain to perform polymerization on the surface of the silicon oxide nanoparticle to prepare the fluorescent conjugated polymer silicon oxide nanoparticle under the condition of the catalyzing by the organic metallic compound. The nanoparticle can be used to detect the content of TNT in a solution. In the method of the invention, the nanoparticle is introduced into a fluorescence sensor, thus obviously increasing the specific area and improving the contact probability of fluorescent conjugated polymer and TNT to be detected and the fluorescent quenching of conjugate polymer is enlarged, thus improving the detection sensitivity of the sensor and realizing the high sensitivity detection to the explosive TNT.

Description

technical field [0001] The invention relates to the field of chemical sensing materials, in particular to a preparation method and application of fluorescent conjugated polymer silicon oxide nanoparticles. Background technique [0002] In today's society, peaceful development is the common theme of all countries in the world. However, terrorist activities have been rampant in recent years, and using explosives to carry out terrorist attacks is a common method of terrorists, which seriously threatens national security. The research on explosive sensors is not only of great significance to the detection of various explosive weapons on the battlefield, but also has far-reaching significance in the protection of the country and the people's security in a peaceful society, especially in anti-terrorism. [0003] There are many kinds of explosives, and most explosives and other dangerous goods contain nitro compounds, among which trinitrotoluene (TNT) is the most widely used, and ...

Claims

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Application Information

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IPC IPC(8): C08G61/02C08G61/12C09K11/06G01N21/64
Inventor 李扬杨慕杰冯继昌
Owner ZHEJIANG UNIV
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