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An unprecedented water stable acylamide-functionalized metal–organic framework for highly efficient CH4/CO2 gas storage/separation and acid–base cooperative catalytic activity

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Abstract

The high porosity, excellent water stability and optimized supramolecular host–guest interactions of MOFs are the three key factors for their potential practical applications in many important areas including gas storage/separation, catalysis and so on. In this study, we designed and constructed a highly porous (3, 36)-connected txt-type acylamide-functionalized metal–organic framework (HNUST-8) from a pyridine-based acylamide-linking diisophthalate and dicopper(II)-paddlewheel clusters. Interestingly, HNUST-8 possesses an exceptionally water-stable framework with a high BET surface area of about 2800 m2 g−1. At 298 K, HNUST-8 exhibits a high excess CO2 uptake of 19.7 mmol g−1 at 40 bar, an excellent total CH4 storage capacity of 223 cm3(STP) cm−3 with a large working capacity of 178 cm3(STP) cm−3 at 80 bar, as well as highly efficient CO2/CH4 and CO2/N2 separation under dynamic conditions at 1 bar. Moreover, with the Lewis acidic open copper(II) sites and Lewis basic acylamide groups integrated into the framework, HNUST-8 demonstrates efficient catalytic activity as an acid–base cooperative catalyst in a tandem one-pot deacetalization–Knoevenagel condensation reaction.

Graphical abstract: An unprecedented water stable acylamide-functionalized metal–organic framework for highly efficient CH4/CO2 gas storage/separation and acid–base cooperative catalytic activity

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Publication details

The article was received on 08 Jul 2018, accepted on 01 Aug 2018 and first published on 02 Aug 2018


Article type: Research Article
DOI: 10.1039/C8QI00662H
Citation: Inorg. Chem. Front., 2018, Advance Article
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    An unprecedented water stable acylamide-functionalized metal–organic framework for highly efficient CH4/CO2 gas storage/separation and acid–base cooperative catalytic activity

    B. Zheng, X. Luo, Z. Wang, S. Zhang, R. Yun, L. Huang, W. Zeng and W. Liu, Inorg. Chem. Front., 2018, Advance Article , DOI: 10.1039/C8QI00662H

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