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A Strategy for Constructing Pore-Space-Partitioned MOFs with High Uptake Capacity for C2 Hydrocarbons and CO2 |
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| Authors: | Dr. Yong Wang Dr. Xiaoxia Jia Dr. Huajun Yang Yanxiang Wang Dr. Xitong Chen Anh N. Hong Prof. Jinping Li Prof. Xianhui Bu Prof. Pingyun Feng |
| Affiliation: | 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 China Department of Chemistry, University of California, Riverside, CA, 92521 USA Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 China Y. Wang and X. Jia contributed equally to this work and were visiting scholar and student at UC Riverside.;2. Department of Chemistry, University of California, Riverside, CA, 92521 USA Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 China Y. Wang and X. Jia contributed equally to this work and were visiting scholar and student at UC Riverside.;3. Department of Chemistry, University of California, Riverside, CA, 92521 USA;4. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 China;5. Department of Chemistry and Biochemistry, California State University Long Beach, Long Beach, CA, 90840 USA |
| Abstract: | 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 CO2 among MOFs. The storage capacity of C2H2 is 234 cm3 g−1 (298 K) and 330 cm3 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. |
| Keywords: | 4,4′-dipyridylsulfide gas adsorption metal–organic frameworks open metal sites pore space partition |