Electron Paramagnetic Resonance Studies of Nitrogen Oxide Adsorbed on Zeolites

概要

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Continuous wave (CW)-electron paramagnetic resonance (EPR) studies of NO adsorbed on sodium ion-and other ion-exchanged zeolites are reviewed. The EPR spectrum of NO monoradical adsorbed on zeolite can be characterized by the three different g-tensor components and the resolved y-component hyperfine coupling with the ^<14>N nucleus. Among the g-tensor components, the value of g_<zz> is very sensitive to the local environment of zeolite and becomes a measure of the electrostatic field in zeolite. The EPR spectra of NO adsorbed on alkaline metal ion-exchanged zeolite are essentially the same as those on sodium ion-exchanged zeolite. The signals assigned to (NO)_2 biradical were detected for EPR spectrum of NO adsorbed on Na-LTA. CW-EPR spectra as well as their theoretical calculation suggested that the two NO molecules are aligned along their N-O bond axes.
愛媛大学の論文