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Ultrastable Mesoporous Hydrogen-Bonded Organic Framework-Based Fiber Composites toward Mustard Gas Detoxification
Summary:
The authors from Northwestern University and Fudan University developed a material named HOF-100 with unique characteristics, achieving promising results in the application of gas adsorption and catalysis fields.
Background:
1. To address the problem of poor stability and limited pore size in traditional hydrogen-bonded organic frameworks (HOFs), previous researchers conducted work, achieving success in creating stable HOFs with microporosity, yet there are problems and deficiencies such as interpenetration or staggered stacking which limit the inclusion of large guest molecules.
2. The authors in this proposed an innovative "shape-matching" stacking strategy and obtained results in creating mesoporous HOF-102 with enhanced thermal and chemical stability.
Research Content:
1.Synthesis:
The authors synthesized the HOF-100 material using a fast precipitation method by introducing acetone into a concentrated N,N-dimethylformamide (DMF) solution of the corresponding tecton.
2.Characterizations:
1) Results of BET show a surface area of 900 m²/g, and pore size distribution indicates a pore size of 0.8×1.2 nm.
2) SEM tests show the particle size of the material is not specified in the text.
3) Other tests include N2 physisorption measurements, thermogravimetric analyses (TGA), and density functional theory (DFT) calculations.
3.Application:
The material was tested in gas adsorption and catalysis applications. For gas adsorption, HOF-100 shows a N2 uptake capacity of 235 cm³/g. For catalysis, it can be used as a photocatalyst for the selective aerobic oxidation of mustard gas simulant.
4.Mechanism:
The analysis of the experiment results shows that the "shape-matching" stacking strategy effectively prevents staggered stacking and expands the pore size. The high p-p stacking interaction energies contribute to the enhanced stability of HOF-100.
Outlook:
Briefly summarize the achievements and significance of this research. This work presents a novel strategy for designing and synthesizing stable mesoporous HOFs, which could open new avenues for the development of advanced porous materials with potential applications in gas storage, separation, and catalysis.
Ultrastable Mesoporous Hydrogen-Bonded Organic Framework-Based Fiber Composites toward Mustard Gas Detoxification
Authors: Kaikai Ma, Peng Li, John H. Xin, Yongwei Chen, Zhijie Chen, Subhadip Goswami, Xiaofeng Liu, Satoshi Kato, Haoyuan Chen, Xuan Zhang, Jiaquan Bai, Megan C. Wasson, Rodrigo R. Maldonado, Randall Q. Snurr, Omar K. Farha
DOI: 10.1016/j.xcrp.2020.100024
Link: https://www.sciencedirect.com/science/article/pii/S266638642030014X
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