Fig 2 - uploaded by Zheng Hai-Fei
Content may be subject to copyright.
¡¡ Raman spectra of methanol
Source publication
This paper mainly studies Raman spectroscopy of C-H stretching vibrational mode of methanol at 2835 cm-1 from 169.2 up to 713.8 MPa under the temperature of 301 K using cubic zirconium oxide Anvil Cell. The result shows that methanol is stable at the experimental pressure, and the Raman shift of methanol at 2835 cm-1 shows a linear dependence with...
Citations
Within a diamond-anvil cell, the in-situ Raman spectroscopic study of silicone fluid was operated at room temperature 298. 1 K and under pressures from 0.1 to 5140.2 MPa. The present study analyzed the correlation of the modes 2906 and 2967 cm(-1) with different pressures, indicating that their wavenumbers linearly increased with increasing pressure. Therefore, this provided the potential to consider the pressure medium silicone fluid as a pressure gauge. The result suggested that silicone fluid could be used as a reliable pressure gauge in high-pressure experiments using diamond-anvil cells with Raman spectrometer, and the correlations between pressure and (delta nu p)2906, (delta nu p)2967 are, p = -0.05[(delta nu p)2967]2 + 73.07 (delta nu p)2967 + 91.54 and p = 0.14 [(delta nu p)2906]2 + 81.9 (delta nu p)2906 + 92.01, respectively.
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 degrees C. 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: upsilon2876 = 0.009 1P + 2875.1, upsilon2931 = 0.005 7P+2930.5. 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.
