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Preparation method for quantum dot fluorescent imprinted polymer

A technology of imprinting polymers and quantum dots, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of lack of universality and selectivity, low sensitivity, slow speed, etc., and achieve good optical stability. , the effect of sensitivity and selectivity improvement

Inactive Publication Date: 2014-04-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the former detection process has a large workload, slow speed, and low sensitivity; the latter lacks certain universality and selectivity.

Method used

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  • Preparation method for quantum dot fluorescent imprinted polymer
  • Preparation method for quantum dot fluorescent imprinted polymer
  • Preparation method for quantum dot fluorescent imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 30.3 mg of sodium borohydride and 51.04 mg of tellurium powder into a 5.0 mL syringe, then add 2.0 mL of double-distilled water, place the syringe in a container filled with water, and keep the reaction overnight. The final white liquid is The desired precursor NaHTe.

[0030] Inject the newly obtained precursor NaHTe into the CdCl in the presence of thiomalic acid (MSA) at a pH of 10.5 with nitrogen and deoxygenation 2 In aqueous solution, the CdCl added 2 2.5H 2 The masses of O and MSA are 182.688 mg and 300.3 mg, respectively. Mixed solution under nitrogen protection 100 o Under the condition of C, reflux reaction was carried out for 60 minutes, and yellow-green quantum dots with the desired wavelength of 558 nm were obtained.

[0031] Add 15 mL of cyclohexane, 3.2 mL of Triton-100, and 3.2 mL of n-hexanol into a three-necked flask, stir for 10 min, then add 600 μL of the prepared CdTe quantum dot aqueous solution, continue stirring for 15 min, then add 100 μ...

Embodiment 2

[0033] 60.6 mg sodium borohydride (NaBH 4 ) and 51.04 mg of tellurium powder were added to a 5.0 mL syringe, then 2.0 mL of double distilled water was added, the syringe was placed in a container filled with water, and the reaction was kept overnight. The final white liquid was the desired precursor NaHTe.

[0034] Inject the newly obtained precursor NaHTe into the CdCl in the presence of thiomalic acid (MSA) at pH 11.5 with nitrogen and deoxygenation 2 In aqueous solution, the CdCl added 2 2.5H 2 The masses of O and MSA are 456.72 mg and 450.45 mg, respectively. The mixed solution was protected under nitrogen at 110 o Under the condition of C, the reaction was refluxed for 20 minutes, and the green quantum dots with the required wavelength of 526nm were obtained.

[0035] Add 15 mL of cyclohexane, 3.6 mL of Triton-100, and 3.6 mL of n-hexanol into a three-necked flask, stir for 20 min, then add 800 μL of the prepared CdTe quantum dot aqueous solution, continue stirring f...

Embodiment 3

[0037] 45 mg sodium borohydride (NaBH 4 ) and 51.04 mg of tellurium powder were added to a 5.0 mL syringe, then 2.0 mL of double distilled water was added, the syringe was placed in a container filled with water, and the reaction was kept overnight. The final white liquid was the desired precursor NaHTe.

[0038] Inject the newly obtained precursor NaHTe into the CdCl in the presence of thiomalic acid (MSA) at a pH of 11.2 2 In aqueous solution, the CdCl added 2 2.5H 2 The masses of O and MSA are 365.376 mg and 375.375 mg, respectively. Mixed solution under nitrogen protection 105 o Under the condition of C, the reaction was refluxed for 6 hours, and the red quantum dots with the desired wavelength of 650 nm were obtained.

[0039] Add 15 mL of cyclohexane, 3.5 mL of Triton-100, and 3.5 mL of n-hexanol into a three-necked flask, stir for 15 min, then add 700 μL of the prepared CdTe quantum dot aqueous solution, continue stirring for 20 min, then add 150 μL TEOS and 100 μ...

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Abstract

The invention provides a preparation method for a quantum dot fluorescent imprinted polymer and belongs to the technical field of preparation of environment-friendly materials. The preparation method comprises the following steps: firstly, synthesizing a precursor sodium hydrogen telluride in a needle pipe; synthesizing a water-soluble CdTe quantum dot by using thiomalic acid as a protection agent; finally, synthesizing the quantum dot fluorescent imprinted polymer which takes cyhalothrin as a template molecule by using a reverse micro-emulsion method so as to optically detect the cyhalothrin. The prepared quantum dot fluorescent imprinted polymer has high optical stability and pH (Potential of Hydrogen) stability and has the capability of selectively identifying the cyhalothrin.

Description

technical field [0001] The invention relates to a preparation method of a quantum dot fluorescent imprinted polymer, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Pyrethroid insecticides such as deltamethrin, fenpropathrin, and cyhalothrin are widely used in my country due to their high insecticidal activity and low residues in vegetables and fruits. Chromatographic methods, such as liquid chromatography, gas chromatography and liquid chromatography-mass spectrometry, are mainly used for the analysis and detection of pyrethroid pesticide residues. Chromatography has high recoveries, good reproducibility, and low detection limits, but requires tedious sample preparation. Commonly used sample pretreatment methods include solvent extraction technology, supercritical extraction technology, microwave extraction technology, membrane separation technology and solid phase extraction technology. Although eac...

Claims

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Application Information

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IPC IPC(8): C08G77/26C08J9/26C09K11/88B01J20/26B01J20/30G01N21/64
Inventor 卫潇孟敏佳宋志龙周志平闫永胜
Owner JIANGSU UNIV
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