Preparation method of rare earth-doped core-shell fluorescent imprinted polymer

A technology of imprinting polymers and fluorescent polymers, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve problems such as limited applications, and achieve the effects of large stokes shift, high chemical stability, and high luminous intensity

Active Publication Date: 2016-09-14
镇江事诚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the survey, most of the reported molecularly imprinted fluorescent sensors use organic small molecule dyes and quantum dots as fluorescent detection signals, and these materials have their own limitations, such as toxicity issues, which will limit their use in the field of biological detection Applications

Method used

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  • Preparation method of rare earth-doped core-shell fluorescent imprinted polymer
  • Preparation method of rare earth-doped core-shell fluorescent imprinted polymer
  • Preparation method of rare earth-doped core-shell fluorescent imprinted polymer

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Experimental program
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Embodiment 1

[0034] Preparation of europium-doped yttrium vanadate nanoparticles (YVO 4 :Eu 3+ ): a) First, 0.95 mmol of yttrium oxide (Y 2 o 3 ) and 0.05 mmol europium oxide (Eu 2 o 3 ) was dissolved in excess dilute nitric acid, heated and evaporated to remove excess nitric acid to obtain nitrates of yttrium and europium, and dispersed in 40mL of water; b) followed by 2.0mmol ammonium metavanadate (NH 4 VO 3 ) into 40mL of water and sonicate for 10min, then use 2M NaOH solution to adjust the pH value from 13 to NH 4 VO 3 Dissolve completely to a clear solution. The solution prepared in step a) was then added dropwise to NH 4 VO 3 In the transparent solution of 80°C, vigorously stirred for 2h, the white precipitate was washed with ethanol and water respectively, and dried at 60°C for use. The resulting nanoparticles are figure 1 as shown in a.

[0035] Preparation of core-shell molecularly imprinted fluorescent polymer (YVO 4 :Eu 3+ @MIPs): Weigh 10mgYVO 4 :Eu 3+ Disperse ...

Embodiment 2

[0037] Preparation of core-shell molecularly imprinted fluorescent polymer (YVO 4 :Eu 3+ @MIPs): Weigh 80mg of YVO prepared above 4 :Eu 3+ Disperse in 50mL of methanol and water mixed solution (4 / 1, v / v), then add 0.1mmol template molecule cyhalothrin (LC), 0.4mmol functional monomer methacrylic acid (MAA) and 2.0mmol The cross-linking agent ethylene glycol dimethacrylate (EGDMA) was dispersed evenly by ultrasonic, and the air in the three-necked flask was exhausted by passing nitrogen gas for 30 minutes, and 10 mg of the initiator azobisisobutyronitrile (AIBN) was added, and the temperature was raised to 50°C and heated for 6.0 h, and then continue to react at 60° C. for 18 h until the polymerization is completed. The product was washed 3 times with water and ethanol. Then, the mixture of methanol and acetic acid (95 / 5, v / v) was used as the extract solution for Soxhlet extraction to remove the template molecule LC, and vacuum-dried at 50°C. The resulting polymer is figu...

Embodiment 3

[0039] Preparation of core-shell molecularly imprinted fluorescent polymer (YVO 4 :Eu 3+ @MIPs): Weigh 50mg of YVO prepared above 4 :Eu 3+ Disperse in 50mL of methanol and water mixed solution (4 / 1, v / v), then add 0.1mmol template molecule cyhalothrin (LC), 0.4mmol functional monomer methacrylic acid (MAA) and 2.0mmol The cross-linking agent ethylene glycol dimethacrylate (EGDMA) was dispersed evenly by ultrasonic, and the air in the three-necked flask was exhausted by passing nitrogen gas for 30 minutes, and 10 mg of the initiator azobisisobutyronitrile (AIBN) was added, and the temperature was raised to 50°C and heated for 6.0 h, and then continue to react at 60° C. for 18 h until the polymerization is completed. The product was washed 3 times with water and ethanol. Then, the mixture of methanol and acetic acid (95 / 5, v / v) was used as the extract solution for Soxhlet extraction to remove the template molecule LC, and vacuum-dried at 50°C. The resulting polymer is figu...

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Abstract

The invention discloses a preparation method of rear earth doped core-shell type fluorescent imprinting polymer. The preparation method comprises the following process steps of (1), preparing europium-doped yttrium vanadate nano particles; (2), preparing core-shell type molecular imprinting fluorescent polymer; and (3), preparing non-imprinted polymer (YVO4:Eu<3+>@NIPs) which is correspondingly applied as reference. The preparation method disclosed by the invention has advantages that rear earth europium doped yttrium vanadate nano particles are synthesized by utilizing a simple wet chemical method, and a molecular imprinting fluorescent sensor with a shell-core structure is prepared by utilizing a molecular imprinting technology. The fluorescent composite material obtained by the preparation method disclosed by the invention has good water-phase dispersion and optical stability, has a series of characteristics of small toxicity, high chemical stability, high and stable luminous intensity, great stokes displacement and the like in comparison with the sensor which is prepared by taking organic micromolecule dyes and quantum dots as fluorescent signals. And moreover, residual cyhalothrin in the aqueous liquor can be quickly identified and optically detected.

Description

technical field [0001] The invention relates to a preparation method of a rare earth-doped core-shell fluorescent imprinted polymer, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] With the continuous improvement of analysis requirements, especially the increasing demand for drug analysis, environmental analysis, food analysis and product testing, sensors, as an important detection device, have attracted more and more attention. The sensor consists of an identification element and a signal conversion device. The recognition element is the core part of the sensor. When it recognizes the target analyte from the complex sample, the physical or chemical response generated is converted into a quantifiable output signal (optical, magnetic, electrical signal) by the converter. By monitoring the output signal Realize the real-time determination of the target object to be measured. Therefore, performance param...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08F220/06C08F222/14C08F2/44C09K11/82C09K11/02G01N21/64
Inventor 刘春波宋志龙刘仕通
Owner 镇江事诚新材料科技有限公司
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