The Effect of Clustering of VO2+ Ions in Sub- and Supercritical Water. An in situ EPR Study Full article
| Journal |
Russian Journal of Physical Chemistry B
ISSN: 1990-7931 , E-ISSN: 1990-7923 |
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| Output data | Year: 2013, Volume: 7, Number: 8, Pages: 924 - 931 Pages count : 8 DOI: 10.1134/S1990793113080113 | ||
| Tags | clustering, ESR, heterogeneous catalyst, in situ spectroscopy, supercritical water, temperature gradient, VO2+, VOSO 4 | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 11-03-12049 |
| 2 | Президиум РАН |
Abstract:
Temperature variations of the EPR spectra of VO2+ ions in sub- and supercritical water under isothermal and temperature gradient conditions are investigated using an in situ EPR. Broadening of the hyperfine structure at increasing temperature and the appearance of an unresolved broad low-intensity line (ΔH pp ≈ 300 Oe) in the supercritical state are observed in the absence of temperature gradients, indicating an increase of exchange interaction between VO2+ ions in supercritical water. An exchange-narrowed anisotropic absorption line is observed under the temperature-gradient conditions in the subcritical water near the transition to a supercritical state. The shape of this line is close to that observed in the solid salt VOSO4 · 3H2O. It is shown that in situ EPR allows us to investigate the effects of changing the local environment of paramagnetic ions, which precedes the well-known process of clustering and formation of amorphous oxide particles in sub- and supercritical conditions.
Cite:
Trukhan S.N.
, Yudanov V.F.
, Martʹyanov O.N.
The Effect of Clustering of VO2+ Ions in Sub- and Supercritical Water. An in situ EPR Study
Russian Journal of Physical Chemistry B. 2013. V.7. N8. P.924 - 931. DOI: 10.1134/S1990793113080113 WOS Scopus РИНЦ ANCAN OpenAlex
The Effect of Clustering of VO2+ Ions in Sub- and Supercritical Water. An in situ EPR Study
Russian Journal of Physical Chemistry B. 2013. V.7. N8. P.924 - 931. DOI: 10.1134/S1990793113080113 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Трухан С.Н.
, Юданов В.Ф.
, Мартьянов О.Н.
Эффекты кластеризации ионов VO2+ в суб- и сверхкритической воде. Исследование методом ЭПР in-situ
Сверхкритические флюиды: Теория и практика. 2013. Т.8. №1. С.57-68. RSCI РИНЦ
Эффекты кластеризации ионов VO2+ в суб- и сверхкритической воде. Исследование методом ЭПР in-situ
Сверхкритические флюиды: Теория и практика. 2013. Т.8. №1. С.57-68. RSCI РИНЦ
Dates:
| Submitted: | Mar 12, 2012 |
| Published print: | Dec 1, 2013 |
| Published online: | Feb 7, 2014 |
Identifiers:
| Web of science: | WOS:000332120600004 |
| Scopus: | 2-s2.0-84896779711 |
| Elibrary: | 21469919 |
| Chemical Abstracts: | 2014:329630 |
| Chemical Abstracts (print): | 161:483352 |
| OpenAlex: | W2047293083 |