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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

DOI: 10.1039/C6QI00547K DOI Help

Authors: I. Spanopoulos (University of Crete) , Constantinos Tsangarakis (University of Crete) , Sarah Barnett (Diamond Light Source) , Harriott Nowell (Diamond Light Source) , Emmanouel Klontza (University of Crete) , George Froudakis (University of Crete) , Pantelis Trikalitis (University of Crete)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Inorg. Chem. Front.

State: Published (Approved)
Published: February 2017
Diamond Proposal Number(s): 9638

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 collapse 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.

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction