Details
| Original language | English |
|---|---|
| Pages (from-to) | 45-51 |
| Number of pages | 7 |
| Journal | Journal of magnetic resonance |
| Volume | 283 |
| Early online date | 31 Aug 2017 |
| Publication status | Published - Oct 2017 |
| Externally published | Yes |
Abstract
Diffusion in porous materials is under ongoing active investigation due to its major role in practical applications such as catalysis and chromatography. The complexity of these systems limits the use of the Einstein-Stokes diffusion theory, and it must be distinguished between the microscopic scale of diffusion at a molecular level, which is sensitive to the local surroundings of a diffusing molecule, and the macroscopic scale which takes into account diffusion spanning multiple pores, grain boundaries and inhomogeneity within the material. Here, we employ an in situ approach for quantitative measurements of the diffusion on a macroscopic length scale. For the first time, full time-resolved spectral spatial EPR imaging in combination with the simultaneous iterative reconstruction technique (SIRT) allows the simultaneous observation of the diffusion of two different molecular species inside of an aerogel in a single experiment.
Keywords
- Aerogel, Diffusion, Electron paramagnetic resonance (EPR) spectroscopy, EPR imaging, Organosilica aerogels, Porous media, Trityl
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biophysics
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of magnetic resonance, Vol. 283, 10.2017, p. 45-51.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Time-, spectral- and spatially resolved EPR spectroscopy enables simultaneous monitoring of diffusion of different guest molecules in nano-pores
AU - Spitzbarth, Martin
AU - Scherer, Andreas
AU - Schachtschneider, Andreas
AU - Imming, Peter
AU - Polarz, Sebastian
AU - Drescher, Malte
N1 - Funding Information: This work was supported by the Deutsche Forschungsgemeinschaft DFG (SPP 1570, DR 743/10-1).
PY - 2017/10
Y1 - 2017/10
N2 - Diffusion in porous materials is under ongoing active investigation due to its major role in practical applications such as catalysis and chromatography. The complexity of these systems limits the use of the Einstein-Stokes diffusion theory, and it must be distinguished between the microscopic scale of diffusion at a molecular level, which is sensitive to the local surroundings of a diffusing molecule, and the macroscopic scale which takes into account diffusion spanning multiple pores, grain boundaries and inhomogeneity within the material. Here, we employ an in situ approach for quantitative measurements of the diffusion on a macroscopic length scale. For the first time, full time-resolved spectral spatial EPR imaging in combination with the simultaneous iterative reconstruction technique (SIRT) allows the simultaneous observation of the diffusion of two different molecular species inside of an aerogel in a single experiment.
AB - Diffusion in porous materials is under ongoing active investigation due to its major role in practical applications such as catalysis and chromatography. The complexity of these systems limits the use of the Einstein-Stokes diffusion theory, and it must be distinguished between the microscopic scale of diffusion at a molecular level, which is sensitive to the local surroundings of a diffusing molecule, and the macroscopic scale which takes into account diffusion spanning multiple pores, grain boundaries and inhomogeneity within the material. Here, we employ an in situ approach for quantitative measurements of the diffusion on a macroscopic length scale. For the first time, full time-resolved spectral spatial EPR imaging in combination with the simultaneous iterative reconstruction technique (SIRT) allows the simultaneous observation of the diffusion of two different molecular species inside of an aerogel in a single experiment.
KW - Aerogel
KW - Diffusion
KW - Electron paramagnetic resonance (EPR) spectroscopy
KW - EPR imaging
KW - Organosilica aerogels
KW - Porous media
KW - Trityl
UR - http://www.scopus.com/inward/record.url?scp=85028706502&partnerID=8YFLogxK
U2 - 10.1016/j.jmr.2017.08.008
DO - 10.1016/j.jmr.2017.08.008
M3 - Article
C2 - 28881232
AN - SCOPUS:85028706502
VL - 283
SP - 45
EP - 51
JO - Journal of magnetic resonance
JF - Journal of magnetic resonance
SN - 1090-7807
ER -