EPR STUDY OF CARBONATE DERIVED AND OZONIDE RADICALS IN CARBONATED APATITES SYNTHESIZED FROM AQUEOUS-SOLUTIONS

被引：20

作者：

MOENS, PDW ^{[1
]}

CALLENS, FJ ^{[1
]}

MATTHYS, PFA ^{[1
]}

BOESMAN, ER ^{[1
]}

VERBEECK, RMH ^{[1
]}

机构：

[1] LAB ANALYT CHEM, GHENT, BELGIUM

来源：

APPLIED MAGNETIC RESONANCE | 1994年 / 6卷 / 1-2期

关键词：

D O I：

10.1007/BF03162485

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

In this study, a series of Na+ and (CO3(2-))-C-12 containing apatites synthesized by a hydrolysis of octo-calciumphosphate (OCP) and dried at 25-degrees-C until constant weight, were examined with EPR after X-irradiation. A variety of different paramagnetic radicals was formed, giving rise to composite and hence complex EPR powder spectra. The spectra were successfully decomposed into their basic components using a multivariate statistical technique. The different components could be identified unambiguously. In this way, it was found that an O-, an O-, a CO3-, two types of CO2- and two types of CO3(3-) ions were formed upon X-irradiation. Also resonances from atomic hydrogen were observed. The most striking feature is the presence of the ozonide ion, which is only rarely observed in irradiated hydroxyapatites. A comparison is made between the EPR spectra of apatite samples prepared by, hydrolysis of OCP on the one hand, and those of samples prepared by hydrolyzing monetite, and the tooth enamel spectrum on the other hand.

引用

页码：121 / 144

页数：24

共 35 条

[1] EFFECT OF CARBONATE CONTENT ON THE ESR-SPECTRUM NEAR G = 2 OF CARBONATED CALCIUMAPATITES SYNTHESIZED FROM AQUEOUS-MEDIA [J].