A Strategy For Constructing Pore-Space-Partitioned Mofs With High Uptake Capacity For C-2 Hydrocarbons And Co2

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 Co2V-pacs MOFs exhibit near or at record high uptake capacities for C2H2, C2H4, C2H6, and CO(2)among MOFs. The storage capacity of C2H2 is 234 cm(3) g(-1)(298 K) and 330 cm(3) g(-1)(273 K) at 1 atm for CPM-733-dps (the Co2V-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 C2H2 adsorption capacity following multiple adsorption-desorption cycles.