Accession Number : AD0709310

Title :   ELECTRON SPIN RESONANCE SPECTRA OF NITRIC OXIDE ADSORBED ON ZEOLITES,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Gardner,C. L. ; Weinberger,M. A.

Report Date : 04 NOV 1969

Pagination or Media Count : 7

Abstract : Electron spin resonance (e.s.r.) spectra of NO adsorbed on the 4 zeolites Linde 4A, 5A, 13X, and hydrogen mordenite were measured at 77K. No e.s.r. signal was observed for NO on silica gel. By use of expressions for the line shapes of polycrystalline samples, assuming axially symmetric g-tensors, and taking into account also isotropic coupling and line width were derived by an iterative procedure. From these, the crystal field splitting, Delta, of the 2p pi levels, which become non-degenerate on adsorption, were calculated. By relating Delta to the interaction of the non-axial components of the quadrupole moment with the corresponding electric field gradients, the non-axial component of the latter is estimated for the surface fields of the zeolites. (Author)

Descriptors :   (*NITROGEN OXIDES, *ELECTRON PARAMAGNETIC RESONANCE), (*SILICATES, ADSORPTION), ELECTROSTATIC FIELDS, SURFACE PROPERTIES, CANADA

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE