多孔性
无定形固体
材料科学
沸石咪唑盐骨架
吸附
微型多孔材料
金属有机骨架
纳米孔
化学工程
多孔介质
纳米技术
复合材料
有机化学
化学
吸附
工程类
作者
Louis Frentzel‐Beyme,Pascal Kolodzeiski,Jan-Benedikt Weiß,Andreas Schneemann,Sebastian Henke
标识
DOI:10.1038/s41467-022-35372-5
摘要
Abstract Metal-organic framework (MOF) glasses are a new class of glass materials with immense potential for applications ranging from gas separation to optics and solid electrolytes. Due to the inherent difficulty to determine the atomistic structure of amorphous glasses, the intrinsic structural porosity of MOF glasses is only poorly understood. Here, we investigate the porosity features (pore size and pore limiting diameter) of a series of prototypical MOF glass formers from the family of zeolitic imidazolate frameworks (ZIFs) and their corresponding glasses. CO 2 sorption at 195 K allows quantifying the microporosity of these materials in their crystalline and glassy states, also providing excess to the micropore volume and the apparent density of the ZIF glasses. Additional hydrocarbon sorption data together with X-ray total scattering experiments prove that the porosity features of the ZIF glasses depend on the types of organic linkers. This allows formulating design principles for a targeted tuning of the intrinsic microporosity of MOF glasses. These principles are counterintuitive and contrary to those established for crystalline MOFs but show similarities to strategies previously developed for porous polymers.
科研通智能强力驱动
Strongly Powered by AbleSci AI