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

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.

Activation‐Dependent Breathing in a Flexible Metal–Organic Framework and the Effects of Repeated Sorption/Desorption Cycling

“…Figure S17 shows the CO 2 sorption isotherm for 1 together with those reported for MIL‐53(Cr) hydrate and COMOC‐2 for qualitative comparison. The total sorption capacities for MIL‐53(Cr) and 1 are comparable although 1 reaches equilibrium at higher pressure.…”

Case studies of clinical hemodialysis membranes: influences of membrane morphology and biocompatibility on uremic blood-membrane interactions and inflammatory biomarkers

“…Absorption peaks characteristic of the symmetric and asymmetric stretching vibrations of sulfone groups on PAES are located at 1,170 and 1,336 cm -1 . Fouling based on contact with uremic blood of real patients reveals slight chemical changes 43 . Shifts in absorption bands and alteration in peak intensities, no matter how minute, could be ascribed to the adhesion of blood aggregates.…”

Simultaneous Photografting of Two Organic Groups on a Gold Surface by using Arylazo Sulfones as Single Precursors

“…1110-1170 cm -1 ) and bending ( (SO2) at ca. 325-365 cm -1 ) vibrations 45,46,47 cannot be safely assigned by IR while they clearly appear in the surface-enhanced Raman spectrum at 1174 cm -1 and 1363 cm -1 (Table 1, Figure 2). XPS.…”