Abstract: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 ν(CH2) and ν(CH3), and all of them move to high position as the system pressure increases. The relation between the system pressure and peaks positions is given as following: νas(CH3)=0.013 1p+2 960.1, νs(CH3)=0.008 8p+2 871.0, νas(CH2)=0.008 9p+2 930.2, νas(CH2)’=0.007 0p+2 903 and νs(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(Δνp)2 960+21.65(r2=0.995 8). This is probably the first organic liquid gauge, especially for systems not expected to emergence of Si, Al and hydroxyl matter.
刘俊杰,郑海飞*. 26 ℃和常压至1.5 GPa压力下2-甲基戊烷拉曼光谱研究[J]. 光谱学与光谱分析, 2007, 27(11): 2254-2257.
LIU Jun-jie,ZHENG Hai-fei*. Research on Raman Spectra of 2-Methylpentaneat at Pressure of 0-1.5 GPa and Temperature of 26 ℃. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(11): 2254-2257.
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