咪唑酯
吸附
沸石咪唑盐骨架
衍射
硫黄
扩散
连接器
光谱学
结晶学
对分布函数
动力学
化学物理
化学
X射线晶体学
金属有机骨架
化学工程
材料科学
无机化学
热力学
物理化学
数学分析
物理
数学
量子力学
计算机科学
光学
工程类
操作系统
冶金
作者
Peter Metz,Matthew R. Ryder,Arvind Ganesan,Souryadeep Bhattacharyya,Stephen C. Purdy,Sankar Nair,Katharine Page
标识
DOI:10.1021/acs.jpcc.2c02217
摘要
Exposure of the metal–organic zeolitic imidazolate framework-8 (ZIF-8) to humid SOx gas cleaves Zn–N bonds, leading to framework disorder and a corresponding decrease in pore accessibility. This work shows that framework disorder exhibits a critical behavior with respect to water concentration in the gas stream. While the quantity of sulfate adsorbed at Zn nodes is at or below the detection threshold for the X-ray pair distribution function technique, precluding direct observation of the adsorbate, powder diffraction reveals clear structural alterations. The onset of linker cleavage correlates to a large microstrain that diminishes as framework disorder increases. Energy-dispersive X-ray spectroscopy shows that the sulfur distribution throughout representative grains is uniform, implying the structure transformation is homogeneously nucleated and not dependent upon gas diffusion kinetics.
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