Synthesis of the fluorescent polymer containing pyrene and its application in the detection of tea polyphenol

IF 3.6 4区工程技术 Q2 ENGINEERING, CHEMICAL

Polymer Engineering and Science Pub Date : 2024-12-24 DOI:10.1002/pen.27052

Chenglin Yi, Chunyan Xu, Xiaoyan Zhao, Chenyi Wang, Hengxue Xiang

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引用次数: 1

Abstract

Abstract Tea polyphenol (TP) is used as a food additive to inhibit lipid peroxidation reactions and extend shelf life, but excessive intake can affect the human immune system. Therefore, developing effective TP detection is significant. Here, pyrene‐based polyimide (Py‐PI) was synthesized by one‐step condensation copolymerization. This polyimide possessed excellent solubility and photoluminescence due to the introduction of pyrene‐conjugated groups. It could be used as fluorescent probe for TP detection in solution. In addition, Py‐PI fluorescent test paper with different morphology were prepared by electrospinning. As the concentration of the spinning solution was 15 wt%, the bead‐like porous polymer electrospun membrane displayed excellent surface wettability which could make the water droplet completely penetrate into the sample within 6 min. The fluorescence enhancement phenomenon could be observed for 5 × 10 −6 mg/mL TP solution on Py‐PI test paper. Furthermore, interference investigation of pH on test paper indicated that the sample exhibited a relatively stable fluorescence “turn‐on” response in acidic conditions. This work provides a convenient and rapid detection of TP antioxidant in the future.

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含芘荧光聚合物的合成及其在茶多酚检测中的应用

摘要茶多酚（Tea polyphenol， TP）作为食品添加剂，具有抑制脂质过氧化反应和延长保质期的作用，但过量摄入会影响人体免疫系统。因此，开展有效的TP检测具有重要意义。本文采用一步缩聚法合成了芘基聚酰亚胺（Py - PI）。由于引入了芘共轭基团，该聚酰亚胺具有优异的溶解度和光致发光性能。可作为荧光探针用于溶液中TP的检测。此外，采用静电纺丝法制备了不同形态的Py - PI荧光试纸。当纺丝溶液浓度为15 wt%时，珠状多孔聚合物电纺丝膜表现出优异的表面润湿性，可使水滴在6 min内完全渗透到样品中。在Py - PI试纸上，5 × 10−6 mg/mL的TP溶液可以观察到荧光增强现象。此外，对试纸上pH值的干扰研究表明，样品在酸性条件下具有相对稳定的荧光“开启”响应。为今后简便、快速地检测TP抗氧化剂提供了方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Engineering and Science 工程技术-高分子科学

CiteScore

5.40

自引率

18.80%

发文量

329

审稿时长

3.7 months

期刊介绍： For more than 30 years, Polymer Engineering & Science has been one of the most highly regarded journals in the field, serving as a forum for authors of treatises on the cutting edge of polymer science and technology. The importance of PE&S is underscored by the frequent rate at which its articles are cited, especially by other publications - literally thousand of times a year. Engineers, researchers, technicians, and academicians worldwide are looking to PE&S for the valuable information they need. There are special issues compiled by distinguished guest editors. These contain proceedings of symposia on such diverse topics as polyblends, mechanics of plastics and polymer welding.