高压下正己醇的拉曼光谱研究

利用碳化硅压腔在25 ℃和163.4～793.4 MPa条件下对正己醇进行了拉曼光谱研究。发现在163.4～767.6 MPa压力下正己醇性质稳定，没有相变发生。在此压力条件下，CH对称伸缩振动和反对称伸缩振动的波峰都随着压力的增大而向高波数偏移，拉曼位移与压力的关系分别为ν_{2 876}=0.009 1P+2 875.1和ν_{2 931}=0.005 7P+2 930.5。到793.4 MPa压力条件下出现了结冰现象。在前人资料的基础上，对甲醇、乙醇和正己醇等醇类的高压性质进行了对比，发现CH对称伸缩振动的波峰偏移与压力的关系不受CC键的影响，即与碳原子数无关。

The Reseach on Raman Spectra of 1-Hexanol at High Pressure

The present paper investigates Raman spectral characters of 1-hexanol by the SiC anvil cell at the pressure of 163.4-793.4 MPa and the temperature of 25 ℃. It was found that under the pressure of 163.4-767.6 MPa the character of 1-Hexanol is steady, and the frequencies of C—H symmetrical stretch vibration and antisymmetric stretch vibration increase with increasing pressure, and the relations between the frequency and the pressure are given as follows: ν2 876=0.009 1P+2 875.1, ν2 931=0.005 7P+2 930.5. At 793.4 MPa there is transformation from liquid state to solid state. On the basis of former data, the authors contrasted the features of 1-hexanol, methanol and ethanol under high pressure. It was revealed that the relation between wave numbers of C—H symmetrical stretch vibration peaks and system pressure is independent of the C—C bond, that is the relation between wave numbers of C—H symmetrical stretch vibration peaks and system pressure is foreign to the number of the carbon atoms.