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Enhanced gas sorption and breathing properties of the new sulfone functionalized COMOC-2 metal organic framework

DOI: 10.1039/C6DT01355D DOI Help

Authors: Guangbo Wang (Ghent University) , Karen Leus (Ghent University) , Sarah Couck (Vrije Universiteit Brussel) , Pieter Tack (Ghent University) , Hannes Depauw (Ghent University) , Ying-Ya Liu (Ghent University) , Laszlo Vincze (Ghent University) , Joeri F. M. Denayer (Vrije Universiteit Brussel) , Pascal Van Der Voort (Ghent University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Dalton Transactions , VOL 45 , PAGES 9485 - 9491

State: Published (Approved)
Published: May 2016
Diamond Proposal Number(s): 12401

Abstract: A new sulfone functionalized vanadium metal–organic framework (MOF), denoted as SO2-COMOC-2, has been synthesized solvothermally. Its structural and gas sorption properties towards CO2 and CH4 have been evaluated and compared to those of the pristine COMOC-2 material. The SO2-COMOC-2 shows a remarkable increase in CO2 capacity at ambient pressure (2.13 mmol g−1 at 273 K vs. 1.23 mmol g−1 for the pristine COMOC-2). Additionally, the high pressure CO2 sorption isotherm shows a distinctive two-step sorption behavior with a final capacity of 12.45 mmol g−1 for SO2-COMOC-2 at 303 K, while for CH4 a typical Type I isotherm was obtained with a capacity of 4.13 mmol g−1. In situ synchrotron X-ray powder diffraction measurements have been carried out to characterize the structural flexibility of the materials, showing both the presence of large pore and narrow pore form. Furthermore, synchrotron XANES and a variety of spectroscopic techniques have been utilized to verify the presence of hydroxyl groups and the existence of the mixed vanadium oxidation states in the titled MOF structure.

Diamond Keywords: Gas Separation

Subject Areas: Chemistry

Instruments: I11-High Resolution Powder Diffraction

Other Facilities: DUBBLE beamline (BM26A, ESRF, Grenoble, France)

Added On: 30/06/2016 16:47

Discipline Tags:

Chemistry Materials Science Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction