MEASUREMENT OF THE RAMAN-SPECTRUM OF LIQUID WATER

The Raman spectrum from water was obtained for a range of conditions f rom ambient to above the critical point, 256 bar and 400 degrees C. A fluorescence-free sapphire high-pressure Raman cell was employed with which the Raman spectra from water were examined between 30 and 4000 c m(-1) Computer deconvolution of the Raman OH-stretching contours allow ed the hydrogen bond strength to be determined from the integrated com ponent intensity ratios by use of the van't Hoff relationship. This pr ocedure yielded a hydrogen bond enthalpy of 2.53+/-0.10 kcal/mol which is in excellent agreement with previously reported values. (C) 1998 A merican Institute of Physics..