Amino-functionalized HPU-23@Ru@Tb as light-driven oxidase-like nanozyme for colorimetric recognition of Hg2+ and ratiometric fluorescence sensing of ClO− and PO43−

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2024-12-30 DOI:10.1007/s00604-024-06874-4

Xiang Liu, Huijun Li, Junjun Sun, Jianchao Shi, Zhouqing Xu, Yan Wang

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Abstract

A HPU-23@Ru@Tb-NH₂ sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb³⁺-functionalized metal organic framework and Ru(bpy)₃²⁺ and applied to the simultaneous detection of Hg²⁺, ClO⁻, and PO₄³⁻ via differently responsive channels. HPU-23@Ru@Tb-NH₂ had a photoresponsive colorimetric response toward Hg²⁺ with a LOD as low as 4.18 nM. In addition, the three emissions of the HPU-23@Ru@Tb-NH₂ sensor array were influenced by ClO⁻ and PO₄³⁻ to varying degrees, causing remarkably distinguishable responses for the fluorescence channels to discriminate ClO⁻ and PO₄³⁻ from each other. The detection limits of ClO⁻ and PO₄³⁻ were 12.26 µM and 0.197 nM, respectively. Therefore, this work demonstrates the feasibility of multi-emission and multi-mode sensing platform, which is able to combine the advantages of different strategies for solving the problems of various toxic substances coexisting in the environment while meeting the needs of accurate and precise results and no side interferences.

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Zinc nitrate hexahydrate

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3,3′,5,5′-tetramethylbenzidine

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N,N-dimethylacetamide

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anhydrous methanol

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tris (2,2′-bipyridine) dichlororuthenium(II) hexahydrate

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anhydrous ethanol

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metal nitrates

来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.