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A kind of preparation method and application of mn-doped zns quantum dot surface imprinted fluorescent probe

A fluorescent probe and surface imprinting technology, applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of complex operation, poor selectivity, and low sensitivity of acrylamide, and improve recognition efficiency and binding speed , fast fluorescence decay and high luminous efficiency

Active Publication Date: 2017-10-20
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome defects such as complex detection of acrylamide in the prior art, low sensitivity, and poor selectivity, and provide a preparation method and application of a molecularly imprinted fluorescent probe on the surface of Mn-doped ZnS quantum dot graphene oxide

Method used

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  • A kind of preparation method and application of mn-doped zns quantum dot surface imprinted fluorescent probe
  • A kind of preparation method and application of mn-doped zns quantum dot surface imprinted fluorescent probe
  • A kind of preparation method and application of mn-doped zns quantum dot surface imprinted fluorescent probe

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Experimental program
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Effect test

Embodiment 1

[0033](1) In a 250mL three-necked flask, add 3.594g ZnSO 4 ·7H 2 O, 0.198g MnCl 2 4H 2 O, add 80mL deionized water to dissolve, mix and stir for 20min at room temperature under nitrogen atmosphere, then add 10mL containing 3g Na 2 S·9H 2 O aqueous solution, the mixed solution was continuously stirred for 18h, and after centrifugation, the precipitate was obtained as Mn:ZnS quantum dots, and then the product was washed and dried with ethanol, and the 1g Mn:ZnS quantum dots prepared above were dispersed in 40mL ethanol solution, and stirred continuously. Add 1mL dropwise gamma -Mercaptopropyltriethoxysilane (KH-580), reflux at 80°C for 6 hours to obtain KH-580 modified Mn:ZnS quantum dots, wash the product with ethanol and dry it for later use.

[0034] (2) In a 100mL three-neck flask, add 50mg GO, then add 25mL ethanol to dissolve, stir well, add 0.5mL KH-580, stir at 50°C, then wash the product with ethanol, and dry it in a vacuum oven. Disperse 50 mg of modified GO in 2...

Embodiment 2

[0042] (1) In a 250mL three-necked flask, add 3.594g of zinc sulfate (ZnSO 4 ·7H 2 O), 0.297g manganese chloride (MnCl 2 4H 2 (0), add 80mL deionized water to dissolve, mix and stir for 25min under room temperature nitrogen atmosphere, then add dropwise 10mL containing 3.0g sodium sulfide (Na 2 S·9H 2 (2) aqueous solution, the mixed solution is continuously stirred for 20h, and after centrifugation, the precipitation is obtained as Mn:ZnS quantum dots, then the product is washed and dried with ethanol, and then 1g of the above-mentioned Mn:ZnS quantum dots is dispersed in 42mL ethanol solution, and continuously Add 2 mL dropwise with stirring gamma -Mercaptopropyltriethoxysilane (KH-580), reflux reaction at 85°C to obtain KH-580 modified Mn:ZnS quantum dots, wash the product with ethanol and dry it for later use.

[0043] (2) In a 100mL three-necked flask, add 50mg GO, then add 25mL ethanol to dissolve, stir well, add 0.75mL KH-580, stir at 50°C, then wash the product wit...

Embodiment 3

[0048] (1) In a 250mL three-necked flask, add 3.594g of zinc sulfate (ZnSO 4 ·7H 2 O), 1.596g manganese chloride (MnCl 2 4H 2 (0), add 80mL deionized water to dissolve, mix and stir for 30min under room temperature nitrogen atmosphere, then add dropwise 10mL containing 3.0g sodium sulfide (Na 2 S·9H 2 (2) aqueous solution, the mixed solution is continuously stirred for 24h, and the precipitation is obtained after centrifugation as Mn:ZnS quantum dots, then the product is washed and dried with ethanol, and then 1g of the above-mentioned Mn:ZnS quantum dots obtained is dispersed in 45mL ethanol solution, continuously Add 3mL dropwise with stirring gamma -Mercaptopropyltriethoxysilane (KH-580), reflux reaction at 82°C to obtain KH-580 modified Mn:ZnS quantum dots, wash the product with ethanol and dry it for later use.

[0049] (2) In a 100mL three-necked flask, add 50mg GO, then add 25mL ethanol to dissolve, stir well, add 1mL KH-580, stir at 50°C, then wash the product wit...

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Abstract

The invention relates to a preparation method and application of a Mn-doped ZnS quantum dot surface imprinted fluorescent probe, which belongs to the technical field of environmental functional material preparation; the invention utilizes a free radical polymerization method to synthesize a pseudo-template of a molecularly imprinted polymer using propionamide, Methacrylic acid (MAA) was used as functional monomer, Mn-doped ZnS quantum dot graphene oxide (Mn:ZnS@GO) was used as matrix material, ethylene glycol dimethacrylate (EGDMA) was used as cross-linking agent, azobis Isobutyronitrile (AIBN) is an initiator, and N,N-dimethylformamide (DMF) is a solvent to synthesize a surface molecularly imprinted fluorescent probe, which is used to enrich and detect acrylamide in food; the method of the present invention The prepared fluorescent probe not only embodies the advantages of surface molecular imprinting, avoids too deep embedding of molecularly imprinted polymer template molecules prepared by traditional methods, improves the recognition efficiency and binding speed, but also takes into account the high luminous efficiency and Fast fluorescence decay and other advantages improve the detection rate and sensitivity.

Description

technical field [0001] The invention relates to a preparation method and application of a Mn-doped ZnS quantum dot surface imprinted fluorescent probe, in particular to a preparation method of a fluorescent acrylamide virtual molecular imprinted polymer based on Mn-doped ZnS quantum dots on the surface of graphene oxide and applications, belonging to the technical field of preparation of environmental functional materials. Background technique [0002] Acrylamide is a water-soluble neurotoxic substance that is carcinogenic to rodents. At present, some high-carbohydrate foods have been found to produce different levels of acrylamide after high-temperature cooking such as frying, roasting, and frying. And its content increases with the increase of processing temperature, which is a potential hazard to human health. In addition, polyacrylamide prepared by polymerization of acrylamide can be added to water as a flocculant to absorb and remove impurities in water, but a very sma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F222/14C08F2/44C08K9/06C08K3/08C08K3/30B01J20/26B01J20/30C09K11/54C09K11/57C09K11/02G01N21/64
Inventor 刘燕仇健倪良孟祥国
Owner JIANGSU UNIV
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