Study of Raman spectra for ethanol under the pressures of 0.1-900 MPa at 24C

Experimental measurement and study of Raman spectra for pure ethanol and 50% ethanol aqueous solution has been conducted at ambient temperature and the pressures of 0.1-900 MPa by using Cubic Zirconia anvil cell. The result shows that the frequency of C-H stretch vibration increases with increasing pressure and each of their relation between the frequency and pressure can be expressed as Mowing: for pure ethanol: v1 = 2881.890 + 0.00127 P + 6.213 ?? 10-6 P2; v2 = 2928.707 + 0.00438 P + 4.772 ?? 10-6 P2; v3 = 2973.457 + 0.00889 P + 3.245 ?? 10-6 P2; for 50% ethanol aqueous solution: v1 = 2885.616 + 0.0108 P - 2.699 ?? 10-6 P2; v2 = 2932.734 + 0.0137 P - 3.346 ?? 10-6 P2; v3 = 2978.115 + 0.016 5 P - 4.914 ?? 10-6 P2. Furthermore, the authors have observed that at the pressure lower than 550 MPa, the strength of hydrogen bonding becomes stronger with increasing pressure.EI081257-12612