On Raman spectra of water, its structure and dependence on temperature

Raman spectra of water within the temperature range 20 to 3 degrees C were investigated. Best of all, the complex shape of the obtained spectra was approximated by four (or five) Gaussian-shaped peaks with their positions 3070, 3230, 3440, 3600 (and 3650) cm(-1). The most intensive constituents were 3230 and 3440 cm(-1) lines, their total contribution to the Raman spectrum of water is higher than 90%. These lines are the most sensitive to the temperature, too. When the temperature decreases from 20 down to 3 degrees C, the positions of these peaks were shifted from 3232 to 3224 cm(-1) and from 3441 to 3434 cm(-1), respectively; and the intensity of 3230 cm(-1) line was increased approximately by 14% in its magnitude.