中文摘要：

利用碳化硅压腔在常压至1．5GPa和26℃条件下对液态2-甲基戊烷进行了拉曼光谱测量，讨论了C-H拉曼峰频率、强度、面积、以及谱峰宽度随压力升高的变化规律。实验结果表明，2-甲基戊烷的拉曼位移在2800-3000cm。范围内的CH。和cH。的伸缩振动谱峰随着压力的增大均连续向高波数位移，其拉曼位移与压力的关系可以表示为Vas（CH3）=O．0131p＋2960．1，Vs（CH3）=0．0088p＋2871．0，vas（CH2）-0．0089p＋2930．2，％。（CH2）’=0．007Op＋2903．1和vs（CH2）=000079p＋2844．7。另外处理实验结果时发现，在0～1．5GPa条件下，2-甲基戊烷的Vas（CH3）拉曼位移可以进行压力标定，其方程为：P（MPa）=76．2（△vp）2960＋21．65（r^2=0．9958）。该压力体标定剂，适合于不希望有Si和Al等元素出现的体系。

英文摘要：

The present paper investigates the Raman spectral character of liquid 2-methylpentane by an experiment at the pressure of 0-1.5 GPa and the temperature of 26 ℃, and defines the relation between the pressure and the Raman peak of 2-methylpentane at ambient temperature. The result shows that there are five characteristic Raman peaks in 2-methylpentane defined as v （CH2） and v（CH3 ）, and all of them move to high position as the system pressure increases. 1 ne relation between the system pressure and peaks positions is given as following： vss （CH3）=0. 013 1p＋2 960. 1, vs （CH3）=0. 008 8p＋2 871.0, vas （CH2）= 0. 008 9p＋2 930. 2, vas（CH2） ＇=0. 007 0p＋2 903 and vs（CH2） =0. 007 9p＋2 844.7. On the other hand, 2-methylpentane is reliable as a liquid pressure gauge for high pressure experiment. The equation applied to demarcate system pressure is also showed： p（MPa）=76. 2（△vp）2 960＋21.65（r^2 =0. 995 8）. This is probably the first organic liquid gauge, especially for systems not expected to emergence of Si, Al and hydroxyl matter.