美国哈佛大学Mason, Jarad A.团队开发了具有高气体溶解度的含微孔水。相关研究成果发表在2022年8月24日出版的《自然》。
与传统溶剂相比，具有永久微孔的液体可以吸收更多的气体分子，为液相气体储存、输送和反应提供了新的机会。目前设计多孔液体的方法依赖于空间体积大的溶剂分子或表面配体，因此不适用于许多重要的溶剂，包括水。
该文中，研究人员报告了一种保持永久微孔并赋予液态水高气体溶解度的通用热力学策略。具体而言，研究人员展示了如何调整微孔沸石和金属-有机框架（MOF）纳米晶体的外表面和内表面化学，以促进在水中形成稳定的分散体，同时保持气体分子可进入的干燥微孔网络。
由于其永久性微孔，这些水性流体可以将气体（包括氧气（O2）和二氧化碳（CO2））浓缩到比典型水性环境中高得多的密度。当这些液体被氧化时，可以将创纪录的高容量O2输送到缺氧红细胞，表明新型微孔液体在生理气体输送中的一个潜在应用。
附：英文原文
Title: Microporous water with high gas solubilities
Author: Erdosy, Daniel P., Wenny, Malia B., Cho, Joy, DelRe, Christopher, Walter, Miranda V., Jimnez-ngeles, Felipe, Qiao, Baofu, Sanchez, Ricardo, Peng, Yifeng, Polizzotti, Brian D., de la Cruz, Monica Olvera, Mason, Jarad A.
Issue&Volume: 2022-08-24
Abstract: Liquids with permanent microporosity can absorb larger quantities of gas molecules than conventional solvents1, providing new opportunities for liquid-phase gas storage, transport and reactivity. Current approaches to designing porous liquids rely on sterically bulky solvent molecules or surface ligands and, thus, are not amenable to many important solvents, including water2,3,4. Here we report a generalizable thermodynamic strategy to preserve permanent microporosity and impart high gas solubilities to liquid water. Specifically, we show how the external and internal surface chemistry of microporous zeolite and metal–organic framework (MOF) nanocrystals can be tailored to promote the formation of stable dispersions in water while maintaining dry networks of micropores that are accessible to gas molecules. As a result of their permanent microporosity, these aqueous fluids can concentrate gases, including oxygen (O2) and carbon dioxide (CO2), to much higher densities than are found in typical aqueous environments. When these fluids are oxygenated, record-high capacities of O2 can be delivered to hypoxic red blood cells, highlighting one potential application of this new class of microporous liquids for physiological gas transport.
DOI: 10.1038/s41586-022-05029-w
Source: https://www.nature.com/articles/s41586-022-05029-w