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.

Graphical Abstract

Abstract Image

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氨基功能化HPU-23@Ru@Tb作为光驱动氧化酶样纳米酶，用于Hg2+的比色识别和ClO -和PO43 -的比例荧光传感

研制了一种具有光驱动氧化酶模拟活性和三发射荧光的HPU-23@Ru@Tb-NH2传感器阵列。它由Tb3+功能化的金属有机骨架和Ru(bpy)32+组成，并通过不同的响应通道用于同时检测Hg2+， ClO−和PO43−。HPU-23@Ru@Tb-NH2对Hg2+具有光响应性比色响应，LOD低至4.18 nM。此外，HPU-23@Ru@Tb-NH2传感器阵列的三个发射受到ClO -和PO43 -的不同程度的影响，导致荧光通道对ClO -和PO43 -的区分反应明显不同。ClO−和PO43−的检出限分别为12.26µM和0.197 nM。因此，本工作证明了多发射、多模式传感平台的可行性，该平台能够结合不同策略的优势，解决环境中多种有毒物质共存的问题，同时满足结果准确、精确、无侧干扰的需求。图形抽象

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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.

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