Paramagnetic Cl-O defect produced by x irradiation of KBr:ClO/sup -//sub 4/

Journal Article · Sat Nov 01 04:00:00 EST 1986 · J. Chem. Phys.; (United States)

OSTI ID:5227877

Sekhar, Y R; Bill, H

Experimental results on KBr:ClO/sup -//sub 4/ single crystals, before and after x irradiation at 77 K, are reported. Infrared and polarized Raman spectra show clearly that the perchlorate molecules are isolated in the KBr matrix and possess T/sub d/ symmetry. EPR spectra, at 9.5 and 36 GHz, of irradiated crystals at 4.2 K indicate the formation of ClO/sup 2-//sub 4/ in trigonal symmetry. The g and /sup 35/Cl hyperfine tensors are found to be strictly axial and collinear. Temperature variation of the EPR spectra presented no motional averaging while uniaxial stress applied to the crystals yielded negative results. The structure of the ClO/sup 2-//sub 4/ molecule is discussed in terms of a trigonal Jahn-Teller effect and a probable dissociation into (ClO/sup -//sub 3/-O/sup -/) complex.

• Research Organization: Groupe de Physico Chimie du Solide, Universite de Geneve, 30, Quai E. Ansermet, 1211 Geneva 4, Switzerland
• OSTI ID: 5227877
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 85:9; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
HALIDES
HALOGEN COMPOUNDS
INFRARED SPECTRA
IONIZING RADIATIONS
JAHN-TELLER EFFECT
MAGNETIC RESONANCE
MATRIX ISOLATION
OXYGEN COMPOUNDS
PERCHLORATES
POTASSIUM BROMIDES
POTASSIUM COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOLYSIS
RAMAN SPECTRA
RESONANCE
SPECTRA
X RADIATION