Electrostatic interaction-enhanced chromophore reaction: a cationic pyridinium-functionalized pyrrolopyrrole aza-BODIPY fluorophore for highly efficient H2S detection

文献类型： 外文期刊

第一作者： Jiang, Xiaomei

作者： Jiang, Xiaomei;Cao, Derong;Wang, Lingyun;Ran, Xueguang

作者机构：

期刊名称：JOURNAL OF MATERIALS CHEMISTRY C （ 影响因子：5.1； 五年影响因子：5.6 ）

ISSN： 2050-7526

年卷期： 2025 年 13 卷 11 期

页码：

收录情况： SCI

摘要： Fluorescence detection of hydrogen sulfide (H2S) has received more attention owing to its vital role in food safety and environmental pollution. Currently, most existing probes show sluggish reactivity, minor spectral changes and strong interference. In this work, we developed a cationic pyridinium-functionalized pyrrolopyrrole aza-BODIPY fluorescent probe (PPAB-Ps) for highly efficient H2S sensing through electrostatic interaction-enhanced chromophore reaction. PPAB-Ps exhibited naked-eye discernible color and fluorescence changes (Delta lambda abs = 165 nm and Delta lambda em = 179 nm), fast response (similar to 2 min), good selectivity, and a low limit of detection (88.4 nM). In addition to H2S-containing aqueous solution, H2S vapor generated distinct dual-signal changes. The practical applications included good recovery of H2S in real water and beer samples. More importantly, a strong correlation was found between the color change of PPAB-Ps-loaded test paper, induced by meat spoilage, and total volatile basic nitrogen (TVB-N) content. Visual monitoring of shrimp and pork freshness was achieved through a smartphone-adaptable color app. This work provides a novel sensing strategy for improving H2S detection performance and offers a promising platform for the rapid and convenient evaluation of H2S in food samples in a non-destructive manner.

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