Natural abundance solid state Ca-43 NMR
Natural abundance solid state Ca-43 NMR
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DOI：
10.1016/s0009-2614(97)00863-4
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发表时间：
1997-09-26
影响因子：
2.8
通讯作者：
Kohn, SC
中科院分区：
文献类型：
--
作者：
Dupree, R;Howes, AP;Kohn, SC
收集了硅酸盐、碳酸盐和硫酸盐等12种固相的CA-43MAS核磁共振波谱。在所有情况下，Ca-43都是以自然丰度存在的，这是第一次有这样的实验被报道。一般说来，这些线条是宽的，没有特征，尽管在方解石的情况下观察到了二阶四极线形。在每一类化合物(硅酸盐、碳酸盐等)中，各向同性化学位移似乎与钙的第一配位壳层的平均Ca-O键长度线性相关，所有所研究的化合物的梯度都相似。(C)1997年爱思唯尔科学公司。
Ca-43 MAS NMR spectra have been collected for 12 solid phases including silicates, carbonates and sulphates. In all cases Ca-43 was present at natural abundance, the first time such experiments have been reported. In general the lines are broad and featureless, though in the case of calcite a second order quadrupolar lineshape was observed. Within each class of compounds (silicates, carbonates etc.), the isotropic chemical shift appears to be linearly correlated with the mean Ca-O bond length of the first coordination shell of calcium, with a similar gradient for all of the classes of compounds studied. (C) 1997 Elsevier Science B.V.