Deng Zheng, Ying Wen, Gong Ke, Zeng Yu-Jia, Yan Youguo, Peng Xinsheng
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
Small. 2020 Mar;16(11):e1907016. doi: 10.1002/smll.201907016. Epub 2020 Feb 21.
Type II porous liquids are demonstrated to be promise porous materials. However, the category of porous hosts is very limited. Here, a porous host metal-organic polyhedra (MOP-18) is reported to construct type II porous liquids. MOP-18 is dissolved into 15-crown-5 as an individual cage (5 nm). Both the molecular dynamics simulations and experimental gravimetric CO solubility test indicate that the inner cavity of MOP-18 in porous liquids is unoccupied by 15-crown-5 and is accessible to CO . Thus, the prepared porous liquids show enhanced gas solubility. Furthermore, the prepared porous liquid is encapsulated into graphene oxide (GO) nanoslits to form a GO-supported porous liquid membrane (GO-SPLM). Owing to the empty cavity of MOP-18 unit cages in porous liquids that reduces the gas diffusion barrier, GO-SPLM significantly enhances the permeability of gas.
II型多孔液体被证明是很有前景的多孔材料。然而，多孔主体的种类非常有限。在此，报道了一种多孔主体金属有机多面体（MOP-18）用于构建II型多孔液体。MOP-18作为单个笼状结构（5纳米）溶解于15-冠-5中。分子动力学模拟和实验重量法CO溶解度测试均表明，多孔液体中MOP-18的内腔未被15-冠-5占据，且CO可进入。因此，所制备的多孔液体表现出增强的气体溶解度。此外，将所制备的多孔液体封装到氧化石墨烯（GO）纳米狭缝中，形成GO支撑的多孔液体膜（GO-SPLM）。由于多孔液体中MOP-18单元笼的空穴减少了气体扩散屏障，GO-SPLM显著提高了气体渗透性。
