一种构建对碳氢化合物和一氧化碳具有高吸附容量的孔隙空间分区金属有机框架的策略。
A Strategy for Constructing Pore-Space-Partitioned MOFs with High Uptake Capacity for C Hydrocarbons and CO.
作者信息
Wang Yong, Jia Xiaoxia, Yang Huajun, Wang Yanxiang, Chen Xitong, Hong Anh N, Li Jinping, Bu Xianhui, Feng Pingyun
机构信息
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, China.
Department of Chemistry, University of California, Riverside, CA, 92521, USA.
出版信息
Angew Chem Int Ed Engl. 2020 Oct 19;59(43):19027-19030. doi: 10.1002/anie.202008696. Epub 2020 Aug 26.
Introduction of pore partition agents into hexagonal channels of MIL-88 type (acs topology) endows materials with high tunability in gas sorption. Here, we report a strategy to partition acs framework into pacs (partitioned acs) crystalline porous materials (CPM). This strategy is based on insertion of in situ synthesized 4,4'-dipyridylsulfide (dps) ligands. One third of open metal sites in the acs net are retained in pacs MOFs; two thirds are used for pore-space partition. The Co V-pacs MOFs exhibit near or at record high uptake capacities for C H , C H , C H , and CO among MOFs. The storage capacity of C H is 234 cm g (298 K) and 330 cm g (273 K) at 1 atm for CPM-733-dps (the Co V-BDC form, BDC=1,4-benzenedicarboxylate). These high uptake capacities are accomplished with low heat of adsorption, a feature desirable for low-energy-cost adsorbent regeneration. CPM-733-dps is stable and shows no loss of C H adsorption capacity following multiple adsorption-desorption cycles.
将孔隙分隔剂引入MIL-88型（acs拓扑结构）的六边形孔道中，可使材料在气体吸附方面具有高度可调性。在此，我们报道一种将acs框架分割成pacs（分割的acs）晶体多孔材料（CPM）的策略。该策略基于原位合成的4,4'-二吡啶硫醚（dps）配体的插入。acs网络中三分之一的开放金属位点保留在pacs金属有机框架中；三分之二用于孔隙空间的分隔。Co V-pacs金属有机框架在金属有机框架中对CH、CH、CH和CO表现出接近或创纪录的高吸附容量。对于CPM-733-dps（Co V-BDC形式，BDC = 1,4-苯二甲酸），CH在1个大气压下的储存容量在298 K时为234 cm³ g，在273 K时为330 cm³ g。这些高吸附容量是在低吸附热的情况下实现的，这是低能量成本吸附剂再生所需的一个特性。CPM-733-dps是稳定的，在多次吸附-解吸循环后CH吸附容量没有损失。
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