Raman spectroscopy of some natural hydrotalcites with sulphate and carbonate in the interlayer
Raman spectroscopy of some natural hydrotalcites with sulphate and carbonate in the interlayer
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DOI：
10.1002/jrs.1050
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发表时间：
2003-10-01
影响因子：
2.5
通讯作者：
Kloprogge, JT
中科院分区：
文献类型：
--
作者：
Frost, RL;Weier, ML;Kloprogge, JT
使用拉曼显微镜探索了一系列镍基和镁基水滑石的结构。这些天然水滑石基于作为夹层中的抗衡阴离子的硫酸根或碳酸根。硫酸盐伸缩振动的位置会发生变化，并且与矿物有关。拉曼光谱显示硫酸盐和碳酸盐的对称性降低，从而得出阴离子与水镁石状羟基表面和夹层中的水键合的结论。在大于 1630 cm(-1) 的位置处，拉曼光谱和红外光谱中都识别出水的弯曲模式，表明水与层间阴离子和水滑石表面均具有强氢键结合。版权所有 (C) 2003 John Wiley Sons, Ltd.
The structures of a series of nickel- and magnesium-based hydrotalcites were explored using Raman microscopy. These natural hydrotalcites are based upon sulphate or carbonate being the counter anion in the interlayer. Variation in the position of the sulphate stretching vibrations occurs and is mineral dependent. Raman spectroscopy shows a reduction in the symmetry of both sulphate and carbonate, which leads to the conclusion that the anions are bonded to the brucite-like hydroxyl surface and to the water in the interlayer. Water bending modes are identified in both the Raman and infrared spectra at positions greater than 1630 cm(-1), indicating that the water is strongly hydrogen bonded to both the interlayer anions and the hydrotalcite surface. Copyright (C) 2003 John Wiley Sons, Ltd.