Infrared spectroscopy of tritiated water

Vibrational Line Shapes, Spectral Diffusion, and Hydrogen Bonding in Liquid Water

“…Nicodemus and Tokmakoff [60] have measured the IR line shape in the OT stretch region of dilute HOT in H 2 O. The peak is at 2121 cm À1 , and the width is 127 cm À1 .…”

“…Pump-probe rotational relaxation experiments [48,58,59] again show a frequency dependence in the amplitude of the anisotropy decay at short times [59]. The IR spectrum has also been measured for the OT stretch of dilute HOT in H 2 O [60], which shows a maximum near 2100 cm À1 and a width of about 130 cm À1 . Efforts were made to understand the scaling of the peak frequency and width as the relevant isotope varies from H to D to T [60].…”

“…The IR spectrum has also been measured for the OT stretch of dilute HOT in H 2 O [60], which shows a maximum near 2100 cm À1 and a width of about 130 cm À1 . Efforts were made to understand the scaling of the peak frequency and width as the relevant isotope varies from H to D to T [60].…”

Infrared Spectroscopy and Hydrogen-Bond Dynamics of Liquid Water from Centroid Molecular Dynamics with an Ab Initio-Based Force Field

“…By contrast, nonlinear infrared spectroscopy overcomes this problem by preparing molecules in spectrally distinct environments and measuring their subsequent relaxation dynamics. Since the OH vibrational frequency of a water molecule is extremely sensitive to the surrounding environment, new insights into the structure and dynamics of the liquid phase have been obtained during the past years from ultrafast infrared spectroscopy. − Narrowband two-color pump−probe measurements of the orientational dynamics of dilute HOD molecules in D 2 O (which hereafter will be referred to as the HOD:D 2 O system) show a different frequency behavior from that observed for HOD molecules in H 2 O (which hereafter will be referred to as the HOD:H 2 O system). , However, these studies also differed in their experimental conditions. In the case of the HOD:D 2 O system, the pump pulse was tuned to different frequencies, while, for the HOD:H 2 O system, the pump pulse was tuned to the center of the absorption band.…”

Transient Glass Formation around a Quadrupolar Photoexcited Dye in a Strongly H‐Bonding Liquid Observed by Transient 2D‐IR Spectroscopy

“…In deuterated HFP,t he equilibrium is significantly shifted toward the tight complex (K = 6.3) and the free energy of complex formation amounts to À4.5 kJ mol À1 .The difference with the protic HFP can be explained by al arger strength of deuterium bonds compared to hydrogen bonds in agreement with literature (Supporting Information, Section S5). [23] In summary,t ransient 2D-IR spectroscopy has provided unprecedented insight into H-bonding dynamics in an electronically excited state.Itreveals the subtle interplay between intramolecular charge transfer,h ydrogen-bond interactions and solvation. We monitored solvent motion around an excited quadrupolar molecule at different stages during the formation of atight asymmetric H-bonded complex.…”