EAGER:Probing Oxygen Selectivity in a Flexible Metal-Organic Framework Using In Situ Spectroscopy

这项工作的目的是设计一种金属有机框架（MOF），在接近环境温度下对氧的选择性超过对氮的选择性。这些综合研究将评估使用气体选择性结构转变作为气体分离手段的可行性，重点是开发一种在近环境温度下保持氧气选择性的材料。氧气，氮气和空气与氧选择性MOF的相互作用将使用原位FTIR和拉曼光谱，以及气体扩散率和吸附测量的组合进行研究。光谱学研究旨在了解哪些特定的气体-基质化学相互作用导致延长的诱导期以延迟柔性框架的打开。扩散率和吸附测量将阐明这是如何受到第二组分的影响，该第二组分在打开结构的亲和力上有很大差异。发展对导致快速打开的特定气体-表面相互作用的化学理解将使化学特异性纳入未来的材料设计。

Lueking155119Penn StateThe proposed work seeks to design a metal organic framework (MOF) that is oxygen-selective over nitrogen at near ambient temperatures. The combined studies will assess the feasibility of using a gas-selective, structural transformation as a means for separations of gases, with a specific focus on developing a material that retains oxygen selectivity at near-ambient temperatures. Oxygen, nitrogen, and air interaction with the oxygen-selective MOF will be investigated using a combination of in situ FTIR and Raman spectroscopy, as well as gas diffusivity and adsorption measurements. The spectroscopy studies will aim to understand which specific gas-substrate chemical interactions lead to an extended induction period to delay opening of the flexible framework. The diffusivity and adsorption measurements will elucidate how this is influenced by a secondary component that drastically differs in affinity to open the structure. Developing a chemical understanding of the specific gas-surface interaction that leads to rapid opening will enable the incorporation of chemical specificity into future material design.