Structure of Liquid Water Determined from Infrared Temperature Profiling and Evolutionary Curve Resolution

Temperature dependence of vibrational relaxation of the OH bending excitation in liquid H2O

“…Here we note that the data were collected in transmission geometry with a water film sandwiched by the Si 3 N 4 membranes. The observed features agree well with the ones obtained by the attenuated total reflection (ATR) technique [17,18], which provides more reliable quantitative information. Figure 3a-d shows transient absorption spectra for different time-delays after OH bending excitation, measured at the temperature of 277 K (4°C), 295 K (22°C), 323 K (50°C), and 348 K (75°C), respectively.…”

Applicability of Near-infrared Spectroscopic Method to Unfreezable Water Measurements in Egg White Lysozyme and Soluble Starch

“…1. Libnau et al (14) reported that the absorption band assigned to the bending vibration of OH did not shift with increasing temperature. These results were interpreted that the wavelengths in the region of combination of the stretching and bending vibrations of OH cannot be easily affected by temperature on the measurement of water content.…”

Long-Range Lipid-Water Interaction as Observed by ATR-FTIR Spectroscopy

“…In order to allow a more quantitative analysis and to enable a systematic explanation of results, the broad OH stretching band can be decomposed into a few Gaussian components (Maréchal 1991;Libnau et al 1994;Brubach et al 2005). Each component can be interpreted as representing water molecules with particular H-bonding properties (Brubach et al 2005), inferring an equilibrium mixture of discrete species differing according to their specific structural arrangements.…”

“…Each component can be interpreted as representing water molecules with particular H-bonding properties (Brubach et al 2005), inferring an equilibrium mixture of discrete species differing according to their specific structural arrangements. Beside the mixture models, also continuum models have been proposed, assuming that distortions of the H-bonding structure result in a continuous distribution of Hbond distances, angles, and energies (Libnau et al 1994). Since the main aim of this chapter is only a qualitative evaluation of different effects on the structure of interlamellar water, a more in-depth analysis of the shape of the OH stretching band will be omitted.…”