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Association forms of NO in sodium ion-exchanged A-type zeolite: Temperature-dependent Q-band EPR spectra
Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama 790-8577, Japan.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Chemical Physics .
Department of Molecular Biotechnology, Chalmers University of Technology, Lundberg Laboratory, P. O. Box 462, SE-405 30 Göteborg, Sweden.
Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
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2000 (English)In: Journal of Physical Chemistry A, ISSN 1089-5639, Vol. 104, no 34, 7950-7956 p.Article in journal (Refereed) Published
Abstract [en]

Nitrogen monoxide (NO) introduced into sodium ion-exchanged A-type (Na-A) zeolite was studied by temperature- and NO pressure-dependent EPR measurements at Q-band in the temperature range between 5 and 140 K. The experimental spectra were successfully utilized to determine accurate values of the g and A(14N) tensors of NO monoradical and the g tensors and zero field splitting (ZFS) parameters, D and E, of the NO-NO biradical. Two different EPR spectra corresponding to low and high temperature forms of the NO monoradical were observed when the NO pressure was low (PNO=3.1 kPa). Based on the g and A tensors, the former was attributed to a rigid form and the latter to a rotational form of the monoradical. For higher NO pressure, the biradical became dominant. The structure of the biradical was discussed in terms of the D and g tensors combined with the spectral line shape simulation method.

Place, publisher, year, edition, pages
2000. Vol. 104, no 34, 7950-7956 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47600DOI: 10.1021/jp0009709OAI: diva2:268496
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-14

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