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Issue 5, 2017
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Directed assembly of a high surface area 2D metal–organic framework displaying the augmented “kagomé dual” (kgd-a) layered topology with high H2 and CO2 uptake

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Abstract

The rigid and highly aromatic hexatopic, carboxylate-based organic linker H6L, under solvothermal reaction conditions with CoCl2·6H2O, directs the assembly of two new 2D MOFs (denoted as 1 and 2) with the rare kgd-a layered topology, as revealed by single crystal X-ray diffraction measurements. A unique 3-connected dinuclear cluster, Co2(–COO)3Cl, was observed in 1 and this MOF was found to be stable upon solvent removal, in contrast to 2, where single Co2+ cations serve as 3-c nodes and the structure collapses upon activation. A detailed Ar sorption measurement at 87 K revealed that 1 has an apparent BET surface area of 1299 m2 g−1 with narrow pore size distribution, centered at 6.9 Å. A very high H2 and CO2 uptake is observed reaching 209.9 cm3 (STP) g−1 and 106.8 cm3 (STP) g−1 at 77 K/1 bar and 273 K/1 bar, respectively, which is attributed to the combination of small pore size and the high density of aromatic rings in 1.

Graphical abstract: Directed assembly of a high surface area 2D metal–organic framework displaying the augmented “kagomé dual” (kgd-a) layered topology with high H2 and CO2 uptake

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Supplementary files

Article information


Submitted
30 Nov 2016
Accepted
04 Feb 2017
First published
08 Feb 2017

Inorg. Chem. Front., 2017,4, 825-832
Article type
Research Article

Directed assembly of a high surface area 2D metal–organic framework displaying the augmented “kagomé dual” (kgd-a) layered topology with high H2 and CO2 uptake

I. Spanopoulos, C. Tsangarakis, S. Barnett, H. Nowell, E. Klontzas, G. E. Froudakis and P. N. Trikalitis, Inorg. Chem. Front., 2017, 4, 825
DOI: 10.1039/C6QI00547K

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