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Fluorescence-sensing-based method for rapidly detecting explosives such as nitrobenzene in water and applications thereof

A nitrobenzene-based, fluorescent sensing technology, applied in the fields of optics and polymer chemistry, can solve the problems of lack of rapid detection methods for explosive content, limit detection of explosives, increase detection costs, etc., and achieve simple and easy preparation process , good water solubility, and the effect of improving sensitivity

Inactive Publication Date: 2013-05-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in many cases, especially in critical situations, it is often necessary to quickly judge the content of explosives on the spot, and the equipment that can be used for rapid detection on the spot is relatively expensive and mainly for the detection of explosive gases. For the content of explosives in water At present, there is no effective rapid detection method
[0003] Conjugated polymers with special fluorescence signal amplification function are excellent sensing active materials, which have sensitive recognition ability for strong electron-deficient nitrobenzene explosives, but the hydrophobicity of these conjugated polymers limits their Application of detection of explosives in aqueous system
Therefore, modifying these conjugated polymers to make them hydrophilic can expand their application range. However, the preparation of water-soluble conjugated polymers involves a very complicated synthesis process, which greatly increases the cost of detection.

Method used

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  • Fluorescence-sensing-based method for rapidly detecting explosives such as nitrobenzene in water and applications thereof
  • Fluorescence-sensing-based method for rapidly detecting explosives such as nitrobenzene in water and applications thereof
  • Fluorescence-sensing-based method for rapidly detecting explosives such as nitrobenzene in water and applications thereof

Examples

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Effect test

Embodiment 1

[0040] (1) Preparation of polymer nanomicelle aqueous solution: disperse amphiphilic polymer F127 (purchased from Aldrich) in ultrapure water, stir magnetically for 30 minutes, and then sonicate for 1 hour to prepare a polymeric solution with a concentration of 0.01 mg / mL Object nano micellar aqueous solution;

[0041] (2) Preparation of fluorescent conjugated polymer solution: Dissolve fluorescent conjugated polymer 9,9-dioctylpolyfluorene (PFO) in tetrahydrofuran to prepare a fluorescent conjugated polymer solution with a concentration of 1 mg / mL;

[0042](3) Preparation of polymer micelle / conjugated polymer nanocomposite fluorescent probe: 50 μL of fluorescent conjugated polymer solution was added dropwise to the polymer nanomicelle aqueous solution under vigorous stirring, so that the mixed solution The total volume is 10ml; mix well by ultrasonication for 1 hour, remove tetrahydrofuran by rotary evaporation, replenish water to the volume before evaporation; filter with 0....

Embodiment 2

[0044] (1) Preparation of polymer nanomicelle aqueous solution: disperse amphiphilic polymer F127 (purchased from Aldrich) in ultrapure water, stir magnetically for 30 minutes, and then sonicate for 1 hour to prepare a polymeric solution with a concentration of 0.1 mg / mL Object nano micellar aqueous solution;

[0045] (2) Preparation of fluorescent conjugated polymer solution: Dissolve fluorescent conjugated polymer 9,9-dioctylpolyfluorene (PFO) in tetrahydrofuran, and prepare a fluorescent conjugated polymer solution with a concentration of 1 mg / mL;

[0046] (3) Preparation of polymer micelle / conjugated polymer nanocomposite fluorescent probe: 100 μL of fluorescent conjugated polymer solution was added dropwise to the polymer nanomicelle aqueous solution under vigorous stirring, so that the mixed solution The total volume is 10ml; mix well by ultrasonication for 2 hours, remove tetrahydrofuran by rotary evaporation, replenish water to the volume before evaporation; filter wit...

Embodiment 3

[0048] (1) Preparation of polymer nanomicelle aqueous solution: disperse amphiphilic polymer F127 (purchased from Aldrich) in ultrapure water, stir magnetically for 30 minutes, and then sonicate for 1 hour to prepare a polymer with a concentration of 1 mg / mL Nano micellar aqueous solution;

[0049] (2) Preparation of fluorescent conjugated polymer solution: Dissolve fluorescent conjugated polymer 9,9-dioctylpolyfluorene (PFO) in tetrahydrofuran, and prepare a fluorescent conjugated polymer solution with a concentration of 1 mg / mL;

[0050] (3) Preparation of polymer micelle / conjugated polymer nanocomposite fluorescent probe: 1000 μL of fluorescent conjugated polymer solution was slowly added dropwise to the polymer nanomicelle aqueous solution under vigorous stirring to make the mixed solution The total volume of the solution is 10ml; mix well by ultrasonication for 4 hours, remove THF by rotary evaporation, and replenish water to the volume before evaporation; filter with a 0...

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Abstract

The invention discloses a fluorescence-sensing-based method for rapidly detecting explosives such as nitrobenzene in water and applications thereof. The self-assembling nano-micelle serves as a carrier for embedding and protecting a fluorescent conjugated polymer and comprises block polyether, grafting cellulose amphiphilic derivatives and the like, and the self-assembling nano-micelle / conjugated polymer compounds with excellent water dispersibility are explosives such as nitrobenzene in water detected by a fluorescence probe. The fluorescence-sensing-based method for rapidly detecting explosives such as nitrobenzene in water provides technical support for developing test paper and kits for rapidly detecting the explosives, and the method is expected to play a role in emergency safety detection, airport check, environmental detection and biological cell imaging and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of optics and polymer chemistry, and relates to a detection method and application of nitrobenzene explosives, in particular to a method and application for rapidly detecting nitrobenzene explosives in water based on fluorescence sensing. Background technique [0002] The rapid, efficient and sensitive detection of toxic explosives has always been the focus of attention in the fields of homeland security and environmental protection. At present, the detection of explosives mainly relies on large-scale detection instruments, such as flight mass spectrometry. However, in many cases, especially in critical situations, it is often necessary to quickly judge the content of explosives on the spot, and the equipment that can be used for rapid detection on the spot is relatively expensive and mainly for the detection of explosive gases. For the content of explosives in water There is still a lack of effective rapid detection...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 王小慧陈惠郭延桂
Owner SOUTH CHINA UNIV OF TECH
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