摘要
金刚石中杂质相的研究一直倍受关注 ,但大多集中在B、N两种杂质的研究上 ,而对于氢在其中的赋存状态研究则刚刚开始。从振动谱学 (IR、Raman)的角度对氢在金刚石中的一种赋存状态———成键氢进行的研究表明 ,成键氢在金刚石中可以以碳氢键、H2 及O H键的形式存在。
The research of purity in diamond has been focused on B & N atoms for a long time. But the research of hydrogen in diamond is just begun rec ently. With the help of vibration spectra including infra-red & Raman spectra, we studied some natural diamonds from Hunan Province and Australia. The hydroge n is bonded in diamond. The first kind of bonded hydrogen is C-H. Where hydroge n can substitute for the carbon atom. Two sharp lines in the Infra-red spectrum at 1405cm- -1 and 3107cm- -1 are associated with the bending and str etching vibrations of the C-H bond; The second kind of bonded hydrogen is hydr ogen molecule (H 2). A sharp line at 4156cm- -1 (theoretical value) in Ram an spectrum and a sharp line at 4106cm-1 in Infra-red spectrum due to distorti on field are observed. The experimental value is lower than theoretical value be cause of the isotopic substitution possible (e.g. HD substitutes for H 2). The molecular hydrogen is stable in the tetrahedral interstitial sites. But the most stable form of H 2 in diamond is the association of a H atom at an anti-bond ing site with a bond-centered H atom;The third kind of bonded hydrogen is O-H & H 2O. There are two sharp lines at 3230cm- [-1] and 3814cm- [-1 ] in Raman spectrum. Owing to different surroundings, hydrogen would be bonde d to different atoms. Consequently, there could be different bonded hydrogen in diamond.
出处
《高校地质学报》
CAS
CSCD
2000年第2期145-148,共4页
Geological Journal of China Universities
基金
广东省自然科学基金资助项目!(49872 0 2 2 )
关键词
金刚石
振动光谱
成键氢
diamond
vibration spectra
bonded hydrogen
