Simultaneous sensing cyanide and fluoride by Lewis acidic atom regulated-chromophore reaction and applications in real samples

文献类型： 外文期刊

第一作者： Wang, Lingyun

作者： Wang, Lingyun;Gan, Yujing;Cao, Derong;Ran, Xueguang

作者机构：

关键词： Fluorescent probe; Detection; Chromophore reaction; Dual-response; Fluoride and cyanide

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：5.1； 五年影响因子：4.7 ）

ISSN： 0026-265X

年卷期： 2024 年 207 卷

页码：

收录情况： SCI

摘要： The development of visually fluorescent probes for CN-- and F-- in one system is challenging. In this paper, a trimethylsilicon-modified pyrrolopyrrole aza-BODIPY (PPAB) conjugate ( PPAB-TMSA ) was synthesized. By use of Lewis acidic atom regulated-chromophore - chromophore reaction strategy, PPAB-TMSA was utilized for CN-- and Frecognition with high selectivity and low limit of detection (1.3 and 12 nM for CN-- and F-- , respectively) for the first time. The sensing mechanism revealed that PPAB core was broken by CN-- and F-- ions through chromophore reaction and trimethylsilicon moiety as an additional F-- recognition site could facilely regulate reactivity. As a result, 7.8-fold higher reaction rate of PPAB-TMSA towards CN-- than that towards F-- and large spectral shift ( Delta lambda ab = 277 nm, Delta lambda em = 172 nm) led to a distinguishable colometric and fluorescent signals. The practicability was demonstrated by visual detecting F-- in toothpaste and CN-- in food samples with PPAB-TMSA-loaded-loaded test paper. The quantitative detecting endogenous CN-- in tapioca flour and bitter almond was successfully demonstrated. This work provides a convenient and visual assay for simultaneous detection CN-- and F-,- , which displays potential applications in real samples.

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