The nature of fluorine in amorphous silica

详细信息	查看全文 | 推荐本文 |

• 作者：Youngman ; Randall E. ; Sen ; Sabyasachi
• 关键词：G188 ; N220 ; S150 ; S160 ; 61.18.Fs ; 61.43.Bn ; 61.43.Fs ; 82.56.Ub
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2004
• 期刊代码：50_00223093
• 类别：ms
• 出版时间：July 1, 2004
• 卷：337
• 期：2
• 页码：182-186
• 文件大小：334 K

摘要

We have used solid-state nuclear magnetic resonance spectroscopy and molecular dynamics simulations to characterize the short-range structure of fluorine-doped silica glass. The fluorine atoms in a glass containing 3 wt%fluorine are found in two different structural environments. The most abundant of these is a fluorine atom bonded to a tetrahedral silicon atom, where the fluorine has replaced one of the bridging oxygens and formed the usual Q³ species. The second, and less abundant of these fluorine types, originates from fluorine bonded to a silicon atom with four bridging oxygen atoms, ultimately giving rise to a fivefold coordinated silicon atom. Additional insight into these Si–F bonding configurations was obtained in the simulation results.