Direct evidence of angular jumps during water reorientation through two-dimensional infrared anisotropy

Journal of Physical Chemistry Letters

Volumn 1, Issue 10, 2010, Pages 1511-1516

  Stirnemann, Guillaume ^a   Laage, Damien ^a  

^a ECOLE NORMALE SUPÉRIEURE   (France)

Author keywords

[No Author keywords available]

Indexed keywords

PHOTONS;

ANISOTROPY DECAY; BULK WATER; EXPERIMENTAL EVIDENCE; FREQUENCY DEPENDENT; PHOTON-ECHO SPECTROSCOPY; PUMP PROBE; TIME CORRELATION FUNCTIONS; ULTRA-FAST;

ANISOTROPY;

EID: 77952730058     PISSN: None     EISSN: 19487185     Source Type: Journal    
DOI: 10.1021/jz100385r     Document Type: Article

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25. This only applies to dilute isotopic mixtures of water where the anisotropy decay is due to molecular reorientation. In pure water, the anisotropy decay is dominated by the faster vibrational energy transfer between molecules (see, e.g., Woutersen, S.; Bakker, H. J. Resonant Intermolecular Transfer of Vibrational Energy in Liquid Water. Nature 1999, 402, 507 - 509 and
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28. X,Y is the component of the OH orientation along the X,Y direction, respectively.
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33. 298K) ? 0.25 is consistent with the detailed evaluation in ref 6.
34. While the frequency-dependent reorientation evidences the existence of angular jumps in bulk water, it cannot provide the jump characteristics. For concentrated aqueous salt solutions, recent 2D IR studies have measured the water HB switching time between an anion and a water molecule (Moilanen, D. E.; Wong, D.; Rosenfeld, D. E.; Fenn, E. E.; Fayer, M. D. Ion-Water Hydrogen-Bond Switching Observed with 2D IR Vibrational Echo Chemical Exchange Spectroscopy Proc. Natl. Acad. Sci. U.S.A. 2009, 106, 375-380) and the angular amplitude of the associated motion (K. J. Gaffney, SLAC, private communication)