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The Utilization of Amide Groups To Expand and Functionalize Metal–Organic Frameworks Simultaneously
Author(s) -
Lu Zhiyong,
Bai Junfeng,
Hang Cheng,
Meng Fei,
Liu Wenlong,
Pan Yi,
You Xiaozeng
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201504907
Subject(s) - amide , pyridine , mesoporous material , adsorption , chemistry , selectivity , polymer chemistry , materials science , organic chemistry , catalysis
A new stepwise ligand‐elongation strategy by amide spacers is utilized to prepare isoreticularly high‐porous metal–organic frameworks (MOFs), namely, quasi‐mesoporous [Cu 2 (PDBAD)(H 2 O)] n (H 4 PDBAD=5,5′‐((4,4′‐((pyridine‐3,5‐dicarbonyl)bis(azanediyl))bis(benzoyl))bis(azanediyl))diisophthalic acid; NJU‐Bai22: NJU‐Bai for Nanjing University Bai's group), and mesoporous [Cu 2 (PABAD)(H 2 O)] n (H 4 PABAD=5,5′‐((4,4′‐((4,4′‐((pyridine‐3,5‐dicarbonyl)bis(azanediyl))bis(benzoyl))bis (azanediyl))bis(benzoyl))bis(azanediyl))diisophthalic acid; NJU‐Bai23). Compared with the prototypical MOF of [Cu 2 (PDAD)(H 2 O)] n (H 4 PDAD=5,5′‐(pyridine‐3,5‐dicarbonyl)bis(azanediyl)diisophthalic acid; NJU‐Bai21, also termed as PCN‐124), both MOFs exhibit almost the same CO 2 adsorption enthalpy and CO 2 selectivity values, and better capacity for CO 2 storage under high pressure; these results make them promising candidate materials for CO 2 capture and sequestration. Interestingly, this new method, in comparison with traditional strategies of using phenyl or triple‐bond spacers, is easier and cheaper, resulting in a better ability to retain high CO 2 affinity and selectivity in MOFs with large pores and high CO 2 storage capacity. Additionally, it may lead to the high thermal stability of the MOFs and also their tolerance to water, which is related to the balance between the density of functional groups and pore sizes. Therefore, this strategy could provide new opportunities to explore more functionalized mesoporous MOFs with high performance.