Preparation method for molecularly imprinted-quantum dot polymer of pyrethroid type pesticide

A technology of pyrethroids and quantum dot polymers, applied in the fields of analytical chemistry and material science, to achieve high sensitivity, convenient operation, and strong selective fluorescence suppression

Active Publication Date: 2015-09-02
创客帮(山东)科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is no publication at home and abroad about the combination of quantum dot fluorescence response characteristics and molecular imprinting technology to obtain molecularly imprinted-quantum dot nanostructure materials (MIP-QDs) with specific fluorescence response characteristics for pyrethroid pesticides. research report

Method used

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  • Preparation method for molecularly imprinted-quantum dot polymer of pyrethroid type pesticide
  • Preparation method for molecularly imprinted-quantum dot polymer of pyrethroid type pesticide
  • Preparation method for molecularly imprinted-quantum dot polymer of pyrethroid type pesticide

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Experimental program
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Embodiment 1

[0025] Add 1.8 mL Triton X-100 (polyethylene glycol octylphenyl ether) into 7.5 mL cyclohexane, stir for 15 min, then add 400 μL quantum dots (QDs) with a particle size of 2.5 nm dropwise, 20 μL cross-linking agent (tetraethyl tetrasilicate TEOS) and 100 μL ammonia water were stirred for 2 h, then cypermethrin (200 μL, 25 mg / mL) was mixed with functional monomer APTES (3-aminopropyl) triethoxysilane ) at a molar ratio of 1:8, stirred at room temperature for 8 h; after the reaction, add 10 mL of acetone, centrifuge at 9000 rpm for 10 min, discard the supernatant, then add 6 mL of double distilled water to disperse, and centrifuge at 9000 rpm for 15 min , discard the supernatant, add ethanol: acetonitrile (8:2, v / v) to extract for 2 h, remove the template molecules, and dry in vacuum at 40 ℃ for 12 h to obtain cypermethrin with a specific fluorescence response characteristic with a particle size of 30-50 Molecularly imprinted-quantum dot polymers for nm.

[0026] Scanning elect...

Embodiment 2

[0029] Add 1.8 mL Triton X-100 into 7.5 mL cyclohexane, stir for 20 min, then add 400 μL quantum dots (QDs) with a particle size of 6.0 nm dropwise, 50 μL crosslinker (TEOS) and 100 μL Ammonia water, stirred for 2 h, then added cyfluthrin (200 μL, 25 mg / mL) and functional monomer APTES at a molar ratio = 1:10, stirred at room temperature for 12 h; after the reaction, added 10 mL of acetone, and centrifuged at 9000 rpm for 10 min, discard the supernatant, then add 6 mL double-distilled water to disperse, centrifuge at 9000 rpm for 15 min, discard the supernatant, add ethanol: acetonitrile (8:2, v / v) to extract for 2 h, remove template molecules, 60 After vacuum drying at ℃ for 8 h, a molecularly imprinted-quantum dot polymer with a particle size of 30-50 nm and a specific fluorescence response characteristic to cyfluthrin was obtained.

Embodiment 3

[0031]Add 1.8 mL Triton X-100 into 7.5 mL cyclohexane, stir for 10 min, then add 400 μL quantum dots (QDs) with a particle size of 4.0 nm dropwise, 30 μL cross-linking agent and 100 μL ammonia water, stir After 2 h, bifenthrin (200 μL, 25 mg / mL) and functional monomer APTES were added at a molar ratio of 1:6, and stirred at room temperature for 12 h. After the reaction, add 10 mL of acetone, centrifuge at 9000 rpm for 10 min, discard the supernatant, then add 6 mL of double distilled water to disperse, centrifuge at 9000 rpm for 15 min, discard the supernatant, add ethanol: acetonitrile (8:2, v / v) Extract for 2 h, remove the template molecules, and dry in vacuum at 50 °C for 10 h to obtain a molecularly imprinted-quantum dot polymer with a particle size of 30-50 nm that has specific fluorescence response characteristics to bifenthrin.

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Abstract

The invention discloses a preparation method for the molecularly imprinted-quantum dot polymer of a pyrethroid type pesticide, which is characterized by comprising the steps of (1) adding 1.8 mL of Triton X-100 in 7.5 mL of cyclohexane, magnetically stirring the obtained solution, dripping 400 mu L of quantum dots, 20-50 mu L of cross-linking agent and 100 mu L of ammoniacal liquor drop by drop, magnetically stirring the obtained solution for 2 hours, then adding 200 mu L of 25 mg / mL template molecular solution and functional monomers, and stirring the obtained solution for 8-12 hours at the room temperature; (2) after the completion of the above reaction, adding 10 mL of acetone for precipitation, centrifuging the obtained product at 9000 rpm for 10 mins, removing the supernatant, adding 6 mL of double distilled water to disperse precipitates, and then centrifuging the obtained product at 9000 rpm for 15 mins, removing the supernatant, adding a mixed liquor of ethanol and acetonitrile in the volume ratio of 8:2, extracting for 2 hours, removing template molecules and obtaining a finished product through the vacuum drying process. The method is high in sensitivity, good in stability and high in selectivity.

Description

technical field [0001] The invention relates to the technical fields of analytical chemistry and material science, in particular to a method for preparing a pyrethroid pesticide molecularly imprinted-quantum dot polymer. Background technique [0002] Pyrethroid pesticides are a class of pesticides synthesized by simulating the chemical structure of natural pyrethrins. They have the advantages of wide insecticidal spectrum and high efficiency. They are used to replace highly toxic and long-residual insecticides such as organochlorine and organophosphorus. Baike), deltamethrin (di kill), kill bacteria fat (quick kill kill D) and so on. Although pyrethroid pesticides are low-toxic insecticides, studies have shown that they can cause harm to the immune system, cardiovascular system, etc. Long-term skin absorption and oral administration can cause poisoning, especially pyrethroids Pesticides are a class of highly lipophilic compounds that can be strongly absorbed by fish scales ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C08J3/24C08L71/00C08K3/30C08K5/5415
Inventor 史西志孙爱丽肖婷婷丁浩王琳
Owner 创客帮(山东)科技服务有限公司
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