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Chinese Journal of High Pressure Physics  > 2009  >  23(4): 305-309 .
WU Xiao-Xin, LI Min, LI Fang-Fei, ZHOU Qiang, GAO Wei, CUI Qi-Liang, ZOU Guang-Tian. Raman Scattering Studies of n-Octane under High Pressure[J]. Chinese Journal of High Pressure Physics, 2009, 23(4): 305-309 . doi: 10.11858/gywlxb.2009.04.011
Citation: WU Xiao-Xin, LI Min, LI Fang-Fei, ZHOU Qiang, GAO Wei, CUI Qi-Liang, ZOU Guang-Tian. Raman Scattering Studies of n-Octane under High Pressure[J]. Chinese Journal of High Pressure Physics, 2009, 23(4): 305-309 . doi: 10.11858/gywlxb.2009.04.011
shu

Raman Scattering Studies of n-Octane under High Pressure

doi: 10.11858/gywlxb.2009.04.011
  • 1.

    School of Materals Science and Engineering, Jilin University, Changchun 130020, China;

  • 2.

    State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

More Information
  • Corresponding author: GAO Wei
  • Received Date: 15 Apr 2009
  • Rev Recd Date: 26 May 2009
  • Publish Date: 15 Aug 2009
    Abstract
  • High pressure Raman spectra of n-octane were investigated by diamond anvil cell (DAC) at pressure up to 7 GPa and ambient temperature. The result shows that the liquid-solid phase transition of n-octane takes place around 0.8 GPa. Within the experimental pressure range, the Raman shift of n-octane moves to higher frequency, while the peak intensity decreases, and the width of peaks broaden with increasing pressure. A turning point is observed in the curve of pressure-dependent Raman shift when the pressure increases up to 6.8 GPa. This result indicates that a solid-solid phase transition for n-octane has been finished at this pressure. The pressure-induced phase transition pressure in alkanes decreases with the length of their chains increasing.

     

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