Natural abundance 43Ca solid-state NMR characterisation of hydroxyapatite:: identification of the two calcium sites

被引：53

作者：

Laurencin, Danielle ^{[1
]}

Wong, Alan ^{[1
]}

Dupree, Ray ^{[1
]}

Smith, Mark E. ^{[1
]}

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 2008年 / 46卷 / 04期

关键词：

NMR; Ca-43; multiple magnetic field analysis; hydroxyapatite;

D O I：

10.1002/mrc.2117

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Natural abundance 43 Ca solid-state NMR of hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) was performed at three different fields (8.45,14.1 and 18.8 T). The two crystallographically distinct calcium sites of the apatite structure were spectroscopically resolved at 18.8 T. The 43 Ca NMR interaction parameters (delta(iso), C-Q and eta Q) of each site were determined by multiple magnetic-field simulations. The peaks with delta(iso) = 11.2 +/- 0.8 and -1.8 +/- 0.8 ppm, both with C-Q = 2.6 +/- 0.4 MHz, were assigned to the Ca(II) and Ca(I) sites, respectively, on the basis of their relative intensities. Copyright (C) 2008 John Wiley & Sons, Ltd.

引用

页码：347 / 350

页数：4

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