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Molecularly-imprinted photonic crystal for detecting organophosphorus toxicants

A technology of photonic crystals and molecular imprinting, applied in the measurement of color/spectral characteristics, other chemical processes, chemical instruments and methods, etc., can solve the problems of complex steps and high cost, and achieve the effect of convenient detection

Inactive Publication Date: 2012-09-19
孟子晖 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a sensor for real-time and rapid detection of organophosphorus poisons to solve the problems of high cost and complicated steps in traditional methods

Method used

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  • Molecularly-imprinted photonic crystal for detecting organophosphorus toxicants
  • Molecularly-imprinted photonic crystal for detecting organophosphorus toxicants
  • Molecularly-imprinted photonic crystal for detecting organophosphorus toxicants

Examples

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example 1

[0017] In Example 1, non-imprinted photonic crystal (NIPC) was prepared without adding MPA template molecules, and the specific adsorption performance of MPA was compared with that of MIPC. The specific operation steps are: measure 50mL deionized water into a 50ml beaker, soak the MIPC / NIPC to be tested in water; add a certain amount of MPA concentrated solution (1mmol / L) to the beaker respectively to adjust the concentration of the adsorption solution 0mmol / L, 1mmol / L, 5mmol / L, 10mmol / L, 15mmol / L, 20mmol / L, 25mmol / L. Every time the concentration is changed, measure the reflection peak intensity with a fiber optic spectrometer. It is observed that the reflection peak decreases with the progress of the adsorption. When the concentration does not change within a certain period of time, it can be considered that the adsorption has stopped. Continue to add concentrated solution to change the concentration of the adsorption solution. . Experimental results such as figure 1 As sho...

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Abstract

The invention discloses a novel sensor, and specifically discloses a molecularly-imprinted photonic crystal (MIPC) which is used for detecting organophosphorus toxicants timely and quickly. The MIPC employs methylphosphonic acid and ethylphosphonic acid as imprinting templates. An intensity of a reflectance spectrum of the corresponding imprinted photonic crystal decreases significantly with the increase of the concentration of a target compound or with the absorption time. The MIPC also shows some practical application values, and shows effects of low detection limit and high sensitivity in detections for the organophosphorus toxicants such as sarin, soman, VX and R-VX prototypes.

Description

technical field [0001] The invention relates to a molecularly imprinted photonic crystal (Molecularly-imprinted photonic crystal, MIPC) sensor, which is used for real-time and rapid detection of organophosphorus poisons methyl phosphate (Methyl phosphate, MPA) and ethyl phosphate (Ethyl phosphate, EPA). Background technique [0002] As a new type of optical material, photonic crystals have become a research hotspot in the field of sensors in recent years. Since periodic structures can diffract specific wavelengths of light, this provides new possibilities for label-free detection and naked-eye detection, making biochemical sensors more accurate. For portability, miniaturization and non-invasive detection become possible. Combining molecular imprinting with photonic crystals, a new type of highly selective, real-time, and rapid non-invasive label-free biochemical sensor model can be prepared, that is, molecularly-imprinted photonic crystals (Molecularly-imprinted photonic cry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F220/28C08F2/48C08J9/28C08J9/26B01J20/26G01N21/25
Inventor 孟子晖俞会根李树广郑存卫
Owner 孟子晖
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