[Structural studies on methanol up to 563 K under pressure].
This paper investigates the structure of methanol by Raman spectrum in diamond anvil cell up to 563 K. The result shows that pressure increases at elevated temperature, but the effect of pressure on the stretching vibrational modes of C-H is inverse to that of temperature. The action of temperature is weaker than that of pressure. So the spectral profile of stretching vibrational modes of C-H gradually changes and the Raman shift moves to higher frequency with increasing temperature and pressure, indicating that the bonding energy of C-H bonding increases with temperature and psessure. In addition, the increase of the relative peak area of O-H stretch band with both the temperature and pressure indicates that the total intensity of O-H bonding is greater compared with that of C-H bonding. Thus, it can be inferred that the higher pressure might slow down the transforming process of kerogen to hydrocarbon under the geological condition.
Qiao
Er-wei
EW
Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Science, Peking University, Beijing 100871, China.
Zheng
Hai-fei
HF
Sun
Qiang
Q
D018130:Diamond / Q000737:chemistry; D006358:Hot Temperature; D006860:Hydrogen Bonding; D000432:Methanol / Q000737:chemistry*; D011312:Pressure; D013059:Spectrum Analysis, Raman / Q000295:instrumentation / Q000379:methods; D014732:Vibration
D018130:Diamond; D000432:Methanol