聚合物基pH响应型荧光材料具有响应快的特点,实时监控,可视化,容易形成。因此,它们在伤口愈合方面引起了广泛的关注,汗液监测,安全和防伪,水产品新鲜度检测,金属离子传感和生物成像。本文分析了基于纤维素的pH响应型荧光材料的制备原理和特性,壳聚糖和蛋白质。然后概述了荧光特性,各种发光材料的环境响应机制和应用。接下来,研究表明,胺,N-杂环,荧光分子结构和聚合物骨架上的羧基和氨基等离子体基团在酸或碱刺激下出现改变电离程度,这影响了发色团电子的光吸收能力,从而使荧光材料在不同pH刺激下产生荧光变化。在此基础上,展望了基于蛋白质和多糖的pH响应型荧光材料发展面临的挑战和发展,为构建高稳定性的pH响应型荧光材料提供理论参考和技术支持,高灵敏度,持久的pH响应和宽检测范围。
Polymer-based pH-responsive fluorescent materials have the characteristics of fast response, real-time monitoring, visualisation, and easy forming. Consequently, they have attracted widespread attention in wound healing, sweat monitoring, security and anti-counterfeiting, freshness detection of aquatic products, metal-ion sensing and bioimaging. This paper analyses the preparation principles and characteristics of pH-responsive fluorescent materials based on cellulose, chitosan and proteins. It then outlines the fluorescence properties, environmental response mechanisms and applications of various luminescent materials. Next, the research indicates that amines, N-heterocyclic rings, carboxyl groups and amino plasmonic groups on the fluorescent molecule structure and polymer skeleton appear to change the degree of ionisation under acid or alkali stimulation, which affects the light absorption ability of chromophore electrons, thus producing fluorescence changes in fluorescent materials under different pH stimuli. On this basis, the challenges and growth encountered in the development of proteins and polysaccharides-based pH-responsive fluorescent materials were prospected to provide theoretical references and technical support for constructing pH-responsive fluorescent materials with high stability, high sensitivity, long-lasting pH-response and wide detection range.