Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 17, Pages 9680-9685Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202100114
Keywords
C2H6; C2H4 separation; carboxylic acids; metal– organic frameworks; nanostructures; materials chemistry
Categories
Funding
- NSFC [22001271, 21701024, 21801252, 21821003, 21890380]
- Chinese Postdoctoral Science Found [2017M622866]
- International Postdoctoral Exchange Fellowship Program [20180055]
- FRF for the Central Universities [20lgpy79]
- Robert A. Welch Foundation [B-0027]
- King Saud University, Riyadh, Saudi Arabia [RSP-2021/55]
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A dynamic spacer installation (DSI) strategy was used to construct a series of multifunctional metal-organic frameworks (MOFs) for ethane/ethylene separation, with increased ethane adsorption capacity and enhanced ethane/ethylene selectivity. The DSI approach showed promising results for the rational design of multifunctional MOFs in challenging tasks.
Herein, a dynamic spacer installation (DSI) strategy has been implemented to construct a series of multifunctional metal-organic frameworks (MOFs), LIFM-61/31/62/63, with optimized pore space and pore environment for ethane/ethylene separation. In this respect, a series of linear dicarboxylic acids were deliberately installed in the prototype MOF, LIFM-28, leading to a dramatically increased pore volume (from 0.41 to 0.82 cm(3) g(-1)) and reduced pore size (from 11.1x11.1 angstrom(2) to 5.6x5.6 angstrom(2)). The increased pore volume endows the multifunctional MOFs with much higher ethane adsorption capacity, especially for LIFM-63 (4.8 mmol g(-1)), representing nearly three times as much ethane as the prototypical counterpart (1.7 mmol g(-1)) at 273 K and 1 bar. Meanwhile, the reduced pore size imparts enhanced ethane/ethylene selectivity of the multifunctional MOFs. Theoretical calculations and dynamic breakthrough experiments confirm that the DSI is a promising approach for the rational design of multifunctional MOFs for this challenging task.
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