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

The temperature dependence of the bending ν$_2$, combination ν$_2$ +ν$_L$, and stretching (ν$_1$, ν$_3$, 2ν$_2$) absorption bands in the infrared spectra of supercooled water with a temperature-change step Δt from 2 to 2.5$^0$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$^0$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$^0$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$^0$C.