A novel aggregation-induced emission fluorescent probe for sensitive detection of pH changes in seafood freshness monitoring

IF 2.1 3区化学 Q2 CHEMISTRY, ORGANIC

Tetrahedron Pub Date : 2025-04-30 DOI:10.1016/j.tet.2025.134700

Ziyi Zhang , Xingwen Wang , Lei Shi , Yunhe Lang , Yuexing Gao , Ruiyang Bai , Siyun Zhang , Jinkun Xi , Chao Han , Xiufeng Zhang

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Abstract

As an important indicator, pH plays an irreplaceable role in health care, food security, and environmental monitoring. Here, a pH-responsive probe SIT-TPE with the pH-responsive N-alkylated indole group that was based on the classic aggregation-induced emission (AIE) group tetraphenylethylene (TPE) core was constructed. The TPE core is fundamentally important that exhibit strong fluorescence in an aggregated state with AIE properties. Its fluorescence intensity has a good linear relationship with pH in the range of pH 5.8–8.8 following with turn-off pH responsiveness and the light magenta color of solution was faded off. In addition, colorimetric indicator paper was constructed by loaded on filter paper, the color changed from light magenta to colorless with the pH increase and it could be cycled for 10 times upon amine adsorption and air. It also be applied for visual monitoring of food (calamari and shrimp) freshness.

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一种新型聚集诱导发射荧光探针用于海鲜新鲜度监测中pH变化的灵敏检测

pH值作为一项重要的指标，在卫生保健、食品安全、环境监测等方面具有不可替代的作用。本文构建了一种ph响应探针SIT-TPE，该探针以典型的聚集诱导发射（AIE）基团四苯基乙烯（TPE）为核心，带有ph响应的n-烷基化吲哚基团。TPE核心在具有AIE性质的聚集状态下表现出强烈的荧光，这是至关重要的。其荧光强度与pH值呈良好的线性关系，在pH值5.8 ~ 8.8范围内，随着pH响应性的关闭，溶液的淡品红色逐渐褪去。此外，将比色指示纸负载在滤纸上制成，随着pH值的增加，颜色由浅品红变为无色，经胺吸附和空气可循环10次。它也可用于食品（鱿鱼和虾）新鲜度的目视监测。

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

Tetrahedron 化学-有机化学

CiteScore

3.90

自引率

4.80%

发文量

439

审稿时长

34 days

期刊介绍： Tetrahedron publishes full accounts of research having outstanding significance in the broad field of organic chemistry and its related disciplines, such as organic materials and bio-organic chemistry. Regular papers in Tetrahedron are expected to represent detailed accounts of an original study having substantially greater scope and details than that found in a communication, as published in Tetrahedron Letters. Tetrahedron also publishes thematic collections of papers as special issues and ''Reports'', commissioned in-depth reviews providing a comprehensive overview of a research area.