A dual-emission fluorescence sensor based on TCPP@UiO-66-NH2 for high-sensitivity detection of copper ions†

IF 2.6 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
CrystEngComm Pub Date : 2024-12-13 DOI:10.1039/D4CE01017E
Jia-qi Du, Du-wei Lin, Wen-yi Chen, Qian Sun and En-qing Gao
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引用次数: 0

Abstract

Copper ions are a significant concern to people's health and wine quality. By adopting a “one-pot” approach, tetra(4-carboxyphenyl)porphyrin (TCPP) molecules were integrated into UiO-66-NH2 metal–organic frameworks, forming TCPP@UiO-66-NH2 dual-emission fluorescence sensing platform towards copper ions. The blue fluorescence of UiO-66-NH2 at 466 nm was deemed an internal reference signal; thus, the built-in corrections in the complex were effectively achieved. The red emission fluorescence of TCPP at 654 nm was quenched by Cu2+, resulting in a reliable signal and noticeable color changes. A quick and sensitive ratio fluorescence sensor was constructed with the signal contrast mechanism. This sensor enabled trace detection of Cu2+ within the concentration range of 0–10 nM, with a detection limit as low as 24 nM, and exhibited good anti-interference capability and cycling stability. Further spiking-recovery experiments demonstrated excellent detection performance and analytical reliability of the sensor in water and red wine samples.

Abstract Image

一种基于TCPP@UiO-66-NH2的双发射荧光传感器,用于高灵敏度检测铜离子†
铜离子是影响人们健康和葡萄酒品质的重要因素。采用“一锅法”将四(4-羧基苯基)卟啉(TCPP)分子整合到uuo -66- nh2金属-有机框架中,形成TCPP@UiO-66-NH2对铜离子双发射荧光传感平台。UiO-66-NH2在466 nm处的蓝色荧光作为内参信号;因此,有效地实现了复合体的内置校正。TCPP在654nm处的红色发射荧光被Cu2+猝灭,信号可靠,颜色变化明显。利用信号对比机理构建了快速灵敏的比例荧光传感器。该传感器可实现0 ~ 10 nM浓度范围内的Cu2+痕量检测,检测限低至24 nM,且具有良好的抗干扰能力和循环稳定性。结果表明,该传感器在水和红酒样品中具有良好的检测性能和分析可靠性。
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来源期刊
CrystEngComm
CrystEngComm 化学-化学综合
CiteScore
5.50
自引率
9.70%
发文量
747
审稿时长
1.7 months
期刊介绍: Design and understanding of solid-state and crystalline materials
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