Enhanced gas sorption and breathing properties of the new sulfone functionalized COMOC-2 metal organic framework. Issue 23 (18th May 2016)

• Record Type: Journal Article
• Authors: Wang, Guangbo; Leus, Karen; Couck, Sarah; Tack, Pieter; Depauw, Hannes; Liu, Ying-Ya; Vincze, Laszlo; Denayer, Joeri F. M.; Van Der Voort, Pascal
• Is Part Of: Dalton transactions. Volume 45:Issue 23(2016)
• Page Start: 9485
• Page End: 9491
• Publication Date: 2016-05-18
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt01355d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A new flexible vanadium based metal organic framework showing a remarkable CO2 uptake. 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.