Defect-containing metal–organic framework materials for sensor applications

An, Dahui; Chen, Long; Liang, Yun; Hou, Juan; Chen, Jiangzhao

doi:10.1039/d3ta05592b

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta05592b

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Defect-containing metal–organic framework materials for sensor applications

Dahui An,

Long Chen,

Yun Liang

et al.

Abstract: Defective MOFs: unique properties and electrochemical sensor applications. Overview of construction principles, mechanisms, and applications.

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Cited by 8 publications

References 139 publications

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Redox Synergy: Enhancing Gas Sensing Stability in 2D Conjugated Metal–Organic Frameworks via Balancing Metal Node and Ligand Reactivity

Yan,

Chen,

et al. 2024

Angewandte Chemie

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Two‐dimensional conjugated metal–organic frameworks (2D c‐MOFs) have emerged as promising candidates in gas sensing, owing to their tunable porous structure and conductivity. Nevertheless, the reported gas sensing mechanisms heavily relied on electron transfer between metal nodes and gas molecules. Normally, the strong interaction between the metal sites and target gas molecule would result poor recovery and thus bad recycling property. Herein, we propose a redox synergy strategy to overcome this issue by balancing the reactivity of metal sites and ligands. A 2D c‐MOF, Zn3(HHTQ)2, was prepared for nitrogen dioxide (NO2) sensing, which was constructed from active ligands (hexahydroxyl‐tricycloquinazoline, HHTQ) and inactive transition‐metal ions (Zn2+). Substantial characterizations and theoretical calculations demonstrated that by utilizing only the redox interactions between ligands and NO2, not only high sensitivity and selectivity, but also excellent cycling stability in NO2 sensing could be achieved. In contrast, control experiments employing isostructural 2D c‐MOFs with Cu/Ni metal nodes exhibited irreversible NO2 sensing. Our current work provides a new design strategy for gas sensing materials, emphasizing harnessing the redox activity of only ligands to enhance the stability of MOF sensing materials.

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Redox Synergy: Enhancing Gas Sensing Stability in 2D Conjugated Metal–Organic Frameworks via Balancing Metal Node and Ligand Reactivity

Yan,

Chen,

et al. 2024

Angewandte Chemie

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Redox Synergy: Enhancing Gas Sensing Stability in 2D Conjugated Metal–Organic Frameworks via Balancing Metal Node and Ligand Reactivity

Yan,

Chen,

et al. 2024

Angew Chem Int Ed

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Recent Advancements in Electrochemical Sensors Based on MOFs and Their Derivatives

Hao,

Song,

Wang

et al. 2024

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Metal‐organic frameworks (MOFs) are composed of metal nodes and organic linkers that can self‐assemble into an infinite network. The high porosity and large surface area of MOFs facilitate the effective enrichment and mass transfer of analytes, which can enhance the signal response and improve the sensitivity of electrochemical sensors. Additionally, MOFs and their derivatives possess the properties of unsaturated metal sites and tunable structures, collectively demonstrating their potential for electrochemical sensing. This paper summarizes the preparation methods, structural properties, and applications of MOFs and their derivatives in electrochemical sensing, emphasizing sensors’ selectivity and sensitivity from the perspectives of direct and indirect detection. Additionally, it also explores future directions and prospects for MOFs in electrochemical sensing, with the aim of overcoming current limitations through innovative approaches.

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Defect-containing metal–organic framework materials for sensor applications

Abstract: Defective MOFs: unique properties and electrochemical sensor applications. Overview of construction principles, mechanisms, and applications.

Cited by 8 publications

References 139 publications

Redox Synergy: Enhancing Gas Sensing Stability in 2D Conjugated Metal–Organic Frameworks via Balancing Metal Node and Ligand Reactivity

Redox Synergy: Enhancing Gas Sensing Stability in 2D Conjugated Metal–Organic Frameworks via Balancing Metal Node and Ligand Reactivity

Redox Synergy: Enhancing Gas Sensing Stability in 2D Conjugated Metal–Organic Frameworks via Balancing Metal Node and Ligand Reactivity

Recent Advancements in Electrochemical Sensors Based on MOFs and Their Derivatives

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