Humidity Induced Proton–Electron Conducting Metal–Organic Frameworks of M3(Hexaiminobenzene)2 (M = Ni, Cu, Fe) for Highly Sensitivity Drug Precursor Chemicals Gases Detection

IF 8.2 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2025-02-10 DOI:10.1021/acssensors.4c02538

Yiling Tan, Le Chen, Minglang Zhang, Bingsheng Du, Chengyao Liang, Xuezheng Guo, Liwen Yang, Shili Zhao, Yuanting Yu, Chun Huang, Hangyu Liu, Wenwen Liu, Linggao Zeng, Peng Zhang, Yuhong Wu, Chao Gao, Yong He

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Abstract

Exploiting high-performance gas sensors is desirable for the on-site and accurate detection of drug precursor chemical gases. Here, the electron–proton conductivity metal–organic frameworks M₃(HIB)₂ were designed to discriminate typical drug precursor chemical gases. The strong d-π conjugation and substantial H₂O ligands in M₃(HIB)₂ generate conducting pathways for electrons and protons, which contribute to novel gas-sensing properties. Remarkably, Fe₃(HIB)₂ demonstrates an ultrahigh response of over 379 toward 60 ppm of toluene at room temperature (RT). Furthermore, the adsorption/desorption behaviors of M₃(HIB)₂ can be tuned by systematically varying the metal center, causing distinctive gas sensing features for pattern recognition of drug precursor chemical gases. The recognition model was constructed using a convolutional neural networks-gated recurrent unit (CNN-GRU) algorithm, exhibiting a high recognition accuracy. The sensing mechanism is revealed by the Lewis and Brønsted acid site adsorption, due to competitive adsorption between H₂O and analyte gases. This work paves the way for the development of proton–electron dual-conducting MOFs for high-performance gas sensors.

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来源期刊

ACS Sensors Chemical Engineering-Bioengineering

CiteScore

14.50

自引率

3.40%

发文量

372

期刊介绍： ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.