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Multi-frequency (S, X, Q and W-band) EPR and ENDOR study of vanadium (IV) incorporation in the aluminium metal-organic framework MIL-53

Irena Nevjestic UGent, Hannes Depauw UGent, Karen Leus UGent, Vidmantas Kalendra, Ignacio Caretti, Gunnar Jeschke, Sabine Van Doorslaer UGent, Freddy Callens UGent, Pascal Van Der Voort UGent and Henk Vrielinck UGent (2015) CHEMPHYSCHEM. 16(14). p.2968-2973
abstract
Doping the well-known metal-organic framework MIL-53(Al) with vanadium(IV) ions leads to significant changes in the breathing behaviour and might have repercussions on the catalytic behaviour as well. To understand the properties of such a doped framework, it is necessary to determine where dopant ions are actually incorporated. Electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) are applied to reveal the nearest environment of the paramagnetic vanadium(IV) dopant ions. EPR spectra of as-synthesised vanadium-doped MIL-53 are recorded at S-, X-, Q- and W-band microwave frequencies. The EPR spectra suggest that at low dopant concentrations (1.0-2.6 mol%) the vanadium(IV) ions are well dispersed in the matrix. Varying the vanadium dopant concentration within this range or the dopant salt leads to the same dominant EPR component. In the ENDOR spectra, hyperfine (HF) interactions with H-1, Al-27 and V-51 nuclei are observed. The HF parameters extracted from simulations strongly suggest that the vanadium(IV) ions substitute Al in the framework.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ENDOR spectroscopy, EPR spectroscopy, doping, vanadium, metal-organic frameworks, ELECTRON-PARAMAGNETIC-RESONANCE, ADSORPTION, HYSTERESIS, COMPOUND, SOLIDS
journal title
CHEMPHYSCHEM
ChemPhysChem
volume
16
issue
14
pages
2968 - 2973
Web of Science type
Article
Web of Science id
000362834600007
JCR category
PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
JCR impact factor
3.138 (2015)
JCR rank
8/35 (2015)
JCR quartile
1 (2015)
ISSN
1439-4235
DOI
10.1002/cphc.201500522
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
6972624
handle
http://hdl.handle.net/1854/LU-6972624
date created
2015-11-03 11:17:56
date last changed
2018-01-29 12:12:54
@article{6972624,
  abstract     = {Doping the well-known metal-organic framework MIL-53(Al) with vanadium(IV) ions leads to significant changes in the breathing behaviour and might have repercussions on the catalytic behaviour as well. To understand the properties of such a doped framework, it is necessary to determine where dopant ions are actually incorporated. Electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) are applied to reveal the nearest environment of the paramagnetic vanadium(IV) dopant ions. EPR spectra of as-synthesised vanadium-doped MIL-53 are recorded at S-, X-, Q- and W-band microwave frequencies. The EPR spectra suggest that at low dopant concentrations (1.0-2.6 mol\%) the vanadium(IV) ions are well dispersed in the matrix. Varying the vanadium dopant concentration within this range or the dopant salt leads to the same dominant EPR component. In the ENDOR spectra, hyperfine (HF) interactions with H-1, Al-27 and V-51 nuclei are observed. The HF parameters extracted from simulations strongly suggest that the vanadium(IV) ions substitute Al in the framework.},
  author       = {Nevjestic, Irena and Depauw, Hannes and Leus, Karen and Kalendra, Vidmantas and Caretti, Ignacio and Jeschke, Gunnar and Van Doorslaer, Sabine and Callens, Freddy and Van Der Voort, Pascal and Vrielinck, Henk},
  issn         = {1439-4235},
  journal      = {CHEMPHYSCHEM},
  keyword      = {ENDOR spectroscopy,EPR spectroscopy,doping,vanadium,metal-organic frameworks,ELECTRON-PARAMAGNETIC-RESONANCE,ADSORPTION,HYSTERESIS,COMPOUND,SOLIDS},
  language     = {eng},
  number       = {14},
  pages        = {2968--2973},
  title        = {Multi-frequency (S, X, Q and W-band) EPR and ENDOR study of vanadium (IV) incorporation in the aluminium metal-organic framework MIL-53},
  url          = {http://dx.doi.org/10.1002/cphc.201500522},
  volume       = {16},
  year         = {2015},
}

Chicago
Nevjestic, Irena, Hannes Depauw, Karen Leus, Vidmantas Kalendra, Ignacio Caretti, Gunnar Jeschke, Sabine Van Doorslaer, Freddy Callens, Pascal Van Der Voort, and Henk Vrielinck. 2015. “Multi-frequency (S, X, Q and W-band) EPR and ENDOR Study of Vanadium (IV) Incorporation in the Aluminium Metal-organic Framework MIL-53.” Chemphyschem 16 (14): 2968–2973.
APA
Nevjestic, I., Depauw, H., Leus, K., Kalendra, V., Caretti, I., Jeschke, G., Van Doorslaer, S., et al. (2015). Multi-frequency (S, X, Q and W-band) EPR and ENDOR study of vanadium (IV) incorporation in the aluminium metal-organic framework MIL-53. CHEMPHYSCHEM, 16(14), 2968–2973.
Vancouver
1.
Nevjestic I, Depauw H, Leus K, Kalendra V, Caretti I, Jeschke G, et al. Multi-frequency (S, X, Q and W-band) EPR and ENDOR study of vanadium (IV) incorporation in the aluminium metal-organic framework MIL-53. CHEMPHYSCHEM. 2015;16(14):2968–73.
MLA
Nevjestic, Irena, Hannes Depauw, Karen Leus, et al. “Multi-frequency (S, X, Q and W-band) EPR and ENDOR Study of Vanadium (IV) Incorporation in the Aluminium Metal-organic Framework MIL-53.” CHEMPHYSCHEM 16.14 (2015): 2968–2973. Print.