Dissimilar dynamics of coupled water vibrations.
Dissimilar dynamics of coupled stretch vibrations of a water molecule are revealed by two-dimensional IR correlation spectroscopy. These are caused by essentially non-Gaussian fluctuations of the electric field exerted by the environment on the individual OH stretch vibrations. Non-Gaussian statistics of the individual site frequency fluctuations results in distinctively different dephasing of the symmetric and asymmetric eigenmodes. This phenomenon can only be described if the assumption of Gaussian dynamics in the traditional theories is abandoned.
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
Thomas L C
TL
Jansen
Dan
D
Cringus
Maxim S
MS
Pshenichnikov
D000042:Absorption; D004583:Electrons; D006860:Hydrogen Bonding; D006878:Hydroxides / Q000737:chemistry; D008958:Models, Molecular; D011789:Quantum Theory; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014732:Vibration; D014867:Water / Q000737:chemistry*
D006878:Hydroxides; D014867:Water; C031356:hydroxide ion