Investigation of the temperature dependence for the spectra of supercooled water in the middle infrared

Abstract

The temperature dependence of the bending ν2, combination ν2 + ν L , and stretching (ν1, ν3, 2ν2) absorption bands in the infrared spectra of supercooled water with a temperature-change step Δt from 2 to 2.5°C was studied using an advanced infrared Fourier spectrometer. It was found that the frequency of the maximum of the stretching absorption band (2700–3700 cm−1) decreases with the reduction of the water temperature from −0.5 to −5.0°C. The frequency of the maximum of the combination absorption band (2130 cm−1) increases with the reduction of the water temperature in a range from −3.0 to −5.0°C. The frequency of the maximum of the absorption band of bending oscillation (1640 cm−1) is invariable with a reduction of the water temperature from −0.5 to −5.0°C.