Advanced search
3 files | 8.16 MB Add to list

Sensing the framework state and guest molecules in MIL-53(Al) via the electron paramagnetic resonance spectrum of V-IV dopant ions

(2017) PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 19(36). p.24545-24554
Author
Organization
Abstract
X-ray diffraction (XRD) and electron paramagnetic resonance spectroscopy (EPR) were combined to study the structural transformations induced by temperature, pressure and air humidity of the "breathing'' metalorganic framework (MOF) MIL-53(Al), doped with paramagnetic V-IV ions, after activation. The correlation between in situ XRD and thermogravimetric analysis measurements showed that upon heating this MOF in air, starting from ambient temperature and pressure, the narrow pore framework first dehydrates and after that makes the transition to a large pore state (lp). The EPR spectra of V-IV=O molecular ions, replacing Al-OH in the structure, also allow to distinguish the as synthesized, hydrated (np-h) and dehydrated narrow pore (np-d), and lp states of MIL-53(Al). A careful analysis of EPR spectra recorded at microwave frequencies between 9.5 and 275 GHz demonstrates that all V-IV=O in the np-d and lp states are equivalent, whereas in the np-h state (at least two) slightly different V-IV=O sites exist. Moreover, the lp MIL-53(Al) framework is accessible to oxygen, leading to a notable broadening of the V-IV=O EPR spectrum at pressures of a few mbar, while such effect is absent for the np-h and np-d states for pressures up to 1 bar.
Keywords
METAL-ORGANIC FRAMEWORK, IN-VIVO, EPR, ADSORPTION, OXIMETRY, SENSORS

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 3.10 MB
  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.95 MB
  • Nevjestic etal.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 3.11 MB

Citation

Please use this url to cite or link to this publication:

MLA
Nevjestic, Irena, et al. “Sensing the Framework State and Guest Molecules in MIL-53(Al) via the Electron Paramagnetic Resonance Spectrum of V-IV Dopant Ions.” PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol. 19, no. 36, 2017, pp. 24545–54.
APA
Nevjestic, I., Depauw, H., Gast, P., Tack, P., Deduytsche, D., Leus, K., … Vrielinck, H. (2017). Sensing the framework state and guest molecules in MIL-53(Al) via the electron paramagnetic resonance spectrum of V-IV dopant ions. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 19(36), 24545–24554.
Chicago author-date
Nevjestic, Irena, Hannes Depauw, Peter Gast, Pieter Tack, Davy Deduytsche, Karen Leus, Melissa Van Landeghem, et al. 2017. “Sensing the Framework State and Guest Molecules in MIL-53(Al) via the Electron Paramagnetic Resonance Spectrum of V-IV Dopant Ions.” PHYSICAL CHEMISTRY CHEMICAL PHYSICS 19 (36): 24545–54.
Chicago author-date (all authors)
Nevjestic, Irena, Hannes Depauw, Peter Gast, Pieter Tack, Davy Deduytsche, Karen Leus, Melissa Van Landeghem, Etienne Goovaerts, Laszlo Vincze, Christophe Detavernier, Pascal Van Der Voort, Freddy Callens, and Henk Vrielinck. 2017. “Sensing the Framework State and Guest Molecules in MIL-53(Al) via the Electron Paramagnetic Resonance Spectrum of V-IV Dopant Ions.” PHYSICAL CHEMISTRY CHEMICAL PHYSICS 19 (36): 24545–24554.
Vancouver
1.
Nevjestic I, Depauw H, Gast P, Tack P, Deduytsche D, Leus K, et al. Sensing the framework state and guest molecules in MIL-53(Al) via the electron paramagnetic resonance spectrum of V-IV dopant ions. PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 2017;19(36):24545–54.
IEEE
[1]
I. Nevjestic et al., “Sensing the framework state and guest molecules in MIL-53(Al) via the electron paramagnetic resonance spectrum of V-IV dopant ions,” PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol. 19, no. 36, pp. 24545–24554, 2017.
@article{8534452,
  abstract     = {X-ray diffraction (XRD) and electron paramagnetic resonance spectroscopy (EPR) were combined to study the structural transformations induced by temperature, pressure and air humidity of the "breathing'' metalorganic framework (MOF) MIL-53(Al), doped with paramagnetic V-IV ions, after activation. The correlation between in situ XRD and thermogravimetric analysis measurements showed that upon heating this MOF in air, starting from ambient temperature and pressure, the narrow pore framework first dehydrates and after that makes the transition to a large pore state (lp). The EPR spectra of V-IV=O molecular ions, replacing Al-OH in the structure, also allow to distinguish the as synthesized, hydrated (np-h) and dehydrated narrow pore (np-d), and lp states of MIL-53(Al). A careful analysis of EPR spectra recorded at microwave frequencies between 9.5 and 275 GHz demonstrates that all V-IV=O in the np-d and lp states are equivalent, whereas in the np-h state (at least two) slightly different V-IV=O sites exist. Moreover, the lp MIL-53(Al) framework is accessible to oxygen, leading to a notable broadening of the V-IV=O EPR spectrum at pressures of a few mbar, while such effect is absent for the np-h and np-d states for pressures up to 1 bar.},
  author       = {Nevjestic, Irena and Depauw, Hannes and Gast, Peter and Tack, Pieter and Deduytsche, Davy and Leus, Karen and Van Landeghem, Melissa and Goovaerts, Etienne and Vincze, Laszlo and Detavernier, Christophe and Van Der Voort, Pascal and Callens, Freddy and Vrielinck, Henk},
  issn         = {1463-9076},
  journal      = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS},
  keywords     = {METAL-ORGANIC FRAMEWORK,IN-VIVO,EPR,ADSORPTION,OXIMETRY,SENSORS},
  language     = {eng},
  number       = {36},
  pages        = {24545--24554},
  title        = {Sensing the framework state and guest molecules in MIL-53(Al) via the electron paramagnetic resonance spectrum of V-IV dopant ions},
  url          = {http://dx.doi.org/10.1039/c7cp04760f},
  volume       = {19},
  year         = {2017},
}

Altmetric
View in Altmetric
Web of Science
Times cited: