Preparation method of fluorescent chemical sensor for polyurethane-based Cu<2+> recognition

Abstract

The invention discloses a preparation method of a fluorescent chemical sensor for polyurethane-based Cu<2+> recognition. A modified rhodamine fluorescent compound is introduced into a polyurethane structure through a chemical bond, and fluorophores are dispersed uniformly and do not migrate or precipitate in the use process, so the fluorescent chemical sensor has stable and lasting fluorescence characteristics. Cu<2+> can be well combined to N atoms on imino groups in rhodamine and O atoms of carbonyl groups, so that the fluorescence characteristic of Cu<2+> is changed, and the purpose of recognizing Cu<2+> is achieved. According to the fluorescent chemical sensor, polyurethane foam is used as a matrix, the fluorescent chemical sensor has the unique properties of large specific surface area and adjustable pore structure, the porous structure can increase the contact between Cu<2+> and fluorophore on a molecular chain, the sensitivity of the fluorescent chemical sensor is greatly improved, rapid detection of Cu<2+> is realized, the solid foam form is convenient to store and use, the synthesis method is simple, the cost is low, and the popularization prospect is good.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a polyurethane-based Cu 2+ Preparation of identified fluorescent chemical sensors. Background technique [0002] Copper ion is one of the essential trace elements in animals and plants, and plays a very important role in life, Cu 2+ An appropriate amount in the body is beneficial to maintain the normal work of the body, and in the body Cu 2+ Disruption of the metabolic balance of the human body may lead to a series of diseases, such as Mencks syndrome and Wilson's syndrome. Copper ions are also widely present in the environment. Although its concentration is not high, long-term accumulation and ineffective degradation will cause toxic effects, so it is considered to be a Cu ion that can pollute the environment. 2+ . Therefore, its rapid, simple and accurate quantitative detection has very important research value. [0003] Cu 2+ There are many detection methods, su...

AI Technical Summary

Problems solved by technology

[0004] Rhodamine compounds are a class of fluorescent dyes with strong molar absorption coefficient and high fluorescence quantum yield. They are commonly used fluorescent probes. However, traditional fluorescent small molecules are often used as sensors with low sensitivity to detection substances and low detection limits. High, relatively long response time, in practical applications, there are also problems such as narrow solution pH range, so it is not conducive to the Cu 2+ Detection in the field of detection

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