Molecular engram polymer and preparation and application thereof

Abstract

The invention relates to a molecular engram polymer, which is used for metal ion detection. The engram and elution objects are metal complex ions; engram geometric dimensioning and combination point location of the polymer are matched with the specificity of the metal complex ions; the polymer is synthesized in-situ on metal membrane surface of a quartz microbalance and a surface plasma resonance device, the metal complex ions are eluted, the metal ions to be detected are processed by complexation and then are selectively absorbed by the molecular engram polymer, and finally the type and content of the metal ions are detected. In the invention, metal ion complexation is adopted to enlarge small changes of metal ion volume by a large extent, template molecular geometric structure memory performance of the molecular engram polymer is utilized to realize high preferential adsorption to improve metal ion detection selectivity effectively, and mass increase and geometric dimensioning enlargement caused by metal ion complexation help further improve sensitivity and antijamming capability of metal ion detection.

Description

technical field [0001] The invention relates to a molecularly imprinted polymer prepared by using a metal complex as a template molecule, and then combined with a quartz microbalance or surface plasmon resonance technology for high-sensitivity and high-selectivity detection of metal ions. The invention focuses on the preparation method of the molecularly imprinted polymer, and belongs to the field of materials. Background technique [0002] Heavy metals are one of the important pollutants of environmental and food pollution, and are potentially harmful, especially heavy metals such as mercury, cadmium, lead, and chromium have significant biological toxicity, and can produce toxicity in trace concentrations. Environmental and food safety monitoring requires the development of real-time, fast, high-sensitivity, cheap and easy-to-operate portable heavy metal detection technology and equipment. Quartz microbalance and surface plasmon resonance technology are two representative ...

AI Technical Summary

Problems solved by technology

[0003] The current scientific and technological progress is: Casilli et al. coated the surface of the metal film electrode of the quartz microbalance with bispyridine derivatives to detect metal ions, and obtained the sensitivity of mmol / l (mmol / l); Ng et al. The thiophene functional group obtained a sensitivity of 10Hz / ppm; Jane and Shih obtained a sensitivity of 50Hz / ppm with crown ether modified gold electrodes, and the detection limit reached 30 micromol / liter (μmol / l); Etorki et al. Acid monomolecular film modified gold electrode, monomolecular film and pb 2+ 、Cu 2+ Plasma binding ability and selectivity; Mirmohseni et al. used polyaniline-modified gold electrodes to detect Cr 6+ ions; Huang et al. used tea melanin (Tea Melanin, TM) modified gold electrode to detect Hg 2+ , Sn 2+ 、 Ge 4+ , Li + 、Ag + , pb 2+ 、Cd 2+ and other ions, the sensitivity obtained is between 0.05Hz / ppm and 2500Hz / ppm, and the corresponding detection limit is between 80ppm and 5ppb, but the selectivity is not ideal

These surface modification methods are based on bare metal ions as detection objects, which are not ideal in terms of the comprehensive performance of detection sensitivity and selectivity, and have not been practically realized.

Images