On the structure of amorphous calcium carbonate - A detailed study by solid-state NMR spectroscopy
On the structure of amorphous calcium carbonate - A detailed study by solid-state NMR spectroscopy
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DOI：
10.1021/ic8007409
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发表时间：
2008-09-01
影响因子：
4.6
通讯作者：
Epple, Matthias
中科院分区：
文献类型：
--
作者：
Nebel, Holger;Neumann, Markus;Epple, Matthias
通过固态NMR光谱（H-1和C-13）研究碳酸钙相方解石、文石、球文石、单水方解石（碳酸钙一水合物）和ikaite（碳酸钙六水合物）。其他模型化合物为碳酸氢钠、碳酸氢钾和氢氧化钙。在此基础上，对合成的无添加剂无定形碳酸钙（ACC）的结构进行了分析。ACC含有分子水（如H2O）、少量移动的氢氧化物，不含碳酸氢盐。这支持了ACC作为碳酸钙生物矿物形成中的瞬时前体的概念。
The calcium carbonate phases calcite, aragonite, vaterite, monohydrocalcite (calcium carbonate monohydrate), and ikaite (calcium carbonate hexahydrate) were studied by solid-state NMR spectroscopy (H-1 and C-13). Further model compounds were sodium hydrogencarbonate, potassium hydrogencarbonate, and calcium hydroxide. With the help of these data, the structure of synthetically prepared additive-free amorphous calcium carbonate (ACC) was analyzed. ACC contains molecular water (as H2O), a small amount of mobile hydroxide, and no hydrogencarbonate. This supports the concept of ACC as a transient precursor in the formation of calcium carbonate biominerals.