金刚石中水的研究

根据红外光谱定量分析的原理，利用吸收峰位之间的相关性，判别出金刚石中结构水(-OH)的伸缩振动频率为3760cm^-1；水分子的反对称伸缩与对称伸缩振动频率分别为3630cm^-1和3200cm^-1。在分别垂直于金刚石(100)、(110)及(111)方向上的定向显微红外光谱研究表明：-OH、H2O及C-C键在不同方向上所测得的浓度是不相同的；样品本身存在晶格畸变；-OH和H2O共有的OH基团在金刚石中的取向并不相同；-OH和H2O并没有进入金刚石的晶格，更多的可能是存在于金刚石的空隙中。

STUDY ON WATER IN DIAMOND

By means of the quantitative analysis of infrared spectra ,it is found that the absorption of 3760cm~(-1) can be attribute to the stretching vibration mode of -OH, and that the absorption of 3630cm~(-1) and 3200cm~(-1) can be attribute to the asystemic and systemic stretching vibration modes of H_2O. On the basis of the orientated infrared spectra data which are contrasted quantitatively, we find that there are different concentrations of H_2O and -OH and C-C bond in the direction vertical to (100), (110) and (111). Analyzing the concentration difference among the H_2O ?-OH and C-C bond in the different direction, we think that H_2O and -OH will not replace the carbon atom of C-C bonds but locate at the interstitial of diamond and OH group of H_2O and -OH has different direction in diamond.