FORMATION OF OXYGEN RADICALS BY COORDINATIVELY UNSATURATED OXYGEN ANIONS ON HYDROXYAPATITE

Authors
MATSUMURA Y KANAI H MOFFAT JB
Citation
Y. Matsumura et al., FORMATION OF OXYGEN RADICALS BY COORDINATIVELY UNSATURATED OXYGEN ANIONS ON HYDROXYAPATITE, Journal of molecular catalysis. A, Chemical, 135(3), 1998, pp. 317-320
Citations number
18
Categorie Soggetti
Chemistry Physical
Journal title
Journal of molecular catalysis. A, Chemical → ACNP
ISSN journal
13811169
Volume
135
Issue
3
Year of publication
1998
Pages
317 - 320
Database
ISI
SICI code
1381-1169(1998)135:3<317:FOORBC>2.0.ZU;2-F
Abstract
Coordinatively unsaturated oxygen (O-CUS(2-)) is generated on nonstoic hiometric hydroxyapatite formally expressed as Ca-9.66(PO4)(5.66)(HPO4 )(0.34)(OH)(1.66) by evacuation at 900 degrees C. Interaction between O-2 and O-CUS(2-) generated by the dehydration of the hydroxyl groups in the apatite results in the simultaneous appearance of ESR centers a ssigned as O-CUS(-) (hole center) and O-2(-) radical oxygen species, e vidently showing that O-CUS(2-) can donate electron to O-2 and activat e it. (C) 1998 Elsevier Science B.V. All rights reserved.