Mondloch Joseph E, Katz Michael J, Planas Nora, Semrouni David, Gagliardi Laura, Hupp Joseph T, Farha Omar K
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
Chem Commun (Camb). 2014 Aug 18;50(64):8944-6. doi: 10.1039/c4cc02401j.
Metal-organic frameworks (MOFs) built up from Zr6-based nodes and multi-topic carboxylate linkers have attracted attention due to their favourable thermal and chemical stability. However, the hydrolytic stability of some of these Zr6-based MOFs has recently been questioned. Herein we demonstrate that two Zr6-based frameworks, namely UiO-67 and NU-1000, are stable towards linker hydrolysis in H2O, but collapse during activation from H2O. Importantly, this framework collapse can be overcome by utilizing solvent-exchange to solvents exhibiting lower capillary forces such as acetone.
由基于Zr6的节点和多齿羧酸盐连接体构建的金属有机框架（MOF）因其良好的热稳定性和化学稳定性而备受关注。然而，最近一些基于Zr6的MOF的水解稳定性受到了质疑。在此，我们证明了两种基于Zr6的框架，即UiO-67和NU-1000，在水中对连接体水解是稳定的，但在从水中活化过程中会坍塌。重要的是，通过利用溶剂交换到具有较低毛细作用力的溶剂（如丙酮）可以克服这种框架坍塌。
