连接器
金属有机骨架
多孔性
吸附
材料科学
聚合物
纳米技术
溶剂
化学工程
结晶
相(物质)
组合化学
化学
计算机科学
有机化学
复合材料
工程类
操作系统
作者
Wufeng Wu,Jingyi Su,Miaomiao Jia,Zhanjun Li,Guoqiang Liu,Wanbin Li
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2020-05-01
卷期号:6 (18)
被引量:79
标识
DOI:10.1126/sciadv.aax7270
摘要
Metal-organic frameworks (MOFs) have been attracting intensive attention because of their commendable potential in many applications. Postsynthetic modification for redesigning chemical characteristics and pore structures can greatly improve performance and expand functionality of MOF materials. Here, we develop a versatile vapor-phase linker exchange (VPLE) methodology for MOF modification. Through solvent-free and environment-friendly VPLE processing, various linker analogs with functional groups but not for straightforward MOF crystallization are inserted into frameworks as daughter building blocks. Besides single exchange for preparing MOFs with dual linkers, VPLE can further be performed by multistage operations to obtain MOF materials with multiple linkers and functional groups. The halogen-incorporated ZIFs exhibit good porosity, tunable molecular affinity, and impressive CO2/N2 and CH4/N2 adsorption selectivities up to 31.1 and 10.8, respectively, which are two to six times higher than those of conventional adsorbents. Moreover, VPLE can substantially enhance the compatibility of MOFs and polymers.
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