Natural abundance 43Ca solid-state NMR characterisation of hydroxyapatite:: identification of the two calcium sites
Natural abundance 43Ca solid-state NMR characterisation of hydroxyapatite:: identification of the two calcium sites
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DOI：
10.1002/mrc.2117
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发表时间：
2008-04-01
影响因子：
2
通讯作者：
Smith, Mark E.
中科院分区：
文献类型：
--
作者：
Laurencin, Danielle;Wong, Alan;Smith, Mark E.
在8.45，14.1和18.8T三个不同磁场下对羟基磷灰石（Ca-10（PO 4）（6）（OH）（2））进行了天然丰度43 Ca固体核磁共振研究。在18.8 T下，通过光谱法解析了磷灰石结构的两个晶体学上不同的钙位点。通过多次磁场模拟确定每个位点的43 Ca NMR相互作用参数（delta（iso）、C-Q和eta Q）。δ（iso）= 11.2 +/- 0.8和-1.8 +/- 0.8 ppm的峰，均具有C-Q = 2.6 +/- 0.4 MHz，基于它们的相对强度，分别归属于Ca（II）和Ca（I）位点。版权所有（C）2008约翰威利父子有限公司
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.