硅油的高压拉曼散射  

High Pressure Raman Spectra of Silicone Oil

作　　者：王晓霞[1] 李志慧[1] 陈晨[1] 王凯[1] 韩博[2] 周强[2] 李芳菲[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,长春130012 [2]吉林大学物理学院,长春130012

出　　处：《高等学校化学学报》2014年第11期2384-2389,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:91014004;11004074;11274137)资助~~

摘　　要：利用金刚石对顶砧高压实验技术及红宝石荧光标压方法,研究了3种不同黏度的硅油(Silicone oil AP150 wacker,Baysilone oil M1000和Baysilone oil M30000)在室温条件下的高压拉曼散射光谱,实验最高压力为20 GPa.获得了硅油的不同拉曼振动模式在高压下的变化规律,发现Baysilone oil M1000和Baysilone oil M30000分别在0.47和0.31 GPa压力下发生分子结构或构型转变,使Si—O伸缩振动拉曼信号强度降低,并产生新的拉曼振动信号;Silicone oil AP 150 wacker,Baysilone oil M1000和Baysilone oil M30000分别在9,8和4.5 GPa压力下出现振动模式消失或振动频率随压力变化的斜率发生改变,表明具有不同结构和黏度的硅油在不同压力下内部结构发生了变化.The Raman spectra of silicone oil with different viscosities（ Silicone oil AP 150 wacker,Baysilone oil M1000 and Baysilone oil M30000） as a function of pressure up to 20 GPa were investigated in a diamond anvil cell. The pressure dependence of Raman vibrations of these silicone oils were obtained and analyzed.The results indicated that the molecular structure or configuration of Baysilone oil M1000 changes at 0. 47 GPa and that of Baysilone oil M30000 changes at 0. 31 GPa,respectively. This is confirmed by the decrease of the intensity of the Si—O stretch vibration and the emerging of novel vibrations at the corresponding solidification point. In addition,it was found that the pressure dependence of the vibrational frequencies changes and some vibrational modes disappear at 10,8 and 4. 5 GPa for Silicone oil AP 150 wacker,Baysilone oil M1000 and Baysilone oil M30000,respectively,indicating the inherent structural change of these silicone oils.

关 键 词：高压 拉曼散射 金刚石对顶砧 硅油 拉曼振动模式 

分 类 号：O641[理学—物理化学] O631.2[理学—化学]