摘要
基于双香豆素查尔酮骨架设计并开发了一种新型比率型荧光探针(DCO),可实现对肼(N_(2)H_(4))的高选择性检测。DCO与N_(2)H_(4)反应后,紫外-可见吸收光谱和荧光发射光谱均呈现显著特征峰衰减/新峰形成的双通道动态响应。该探针对N_(2)H_(4)表现出优异的选择性,检测限低至10-6mol/L,并在较宽pH范围内保持稳定。核磁共振氢谱表征证实,探针对N_(2)H_(4)的识别机制涉及α,β-不饱和羰基查尔酮环化反应,进而触发基于分子内电荷转移(ICT)过程导致比率型荧光信号变化。实际应用表明,荧光探针DCO能应用于真实水样中N_(2)H_(4)的定量测定。
Based on a coumarin-chalcone skeleton,a novel ratiometric fluorescent probe,DCO,is designed and developed for highly selective detection of hydrazine(N_(2)H_(4)).Upon reaction with N_(2)H_(4),DCO exhibits a dual-channel dynamic response characterized by the significant attenuation of characteristic peaks in UV-Vis absorption spectra and the formation of new emission peaks in fluorescence spectra.This probe demonstrates excellent selectivity toward N_(2)H_(4),with a detection limit as low as 10-6 mol/L,and remains stable over a wide pH range.It is confirmed through 1HNMR characterization that the recognition mechanism of hydrazine by this probe involves a cyclization reaction ofα,β-unsaturated carbonyl chalcone moiety with N_(2)H_(4),subsequently triggering ratiometric fluorescence signal changes through an intramolecular charge transfer(ICT)process.Practical applications verify that DCO can be effectively applied to the quantitative detection of N_(2)H_(4) in real water samples.
作者
曾碧涛
何爱江
万志翔
赵志刚
石治川
ZENG Bi-tao;HE Ai-jiang;WAN Zhi-xiang;ZHAO Zhi-gang;SHI Zhi-chuan(Yibin Vocational&Technical College,Yibin 644100,China;College of Chemistry&Environment,Southwest Minzu University,Chengdu 610225,China)
出处
《现代化工》
北大核心
2025年第10期276-281,共6页
Modern Chemical Industry
基金
宜宾职业技术学院院级重点科研项目(22ZRZD-07)。
关键词
肼
比率型探针
双香豆素
查尔酮环化
分子内电荷转移
hydrazine
ratiometric probe
dicoumarin
chalcone cyclization
intramolecular charge transfer
