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Sequence of water thermodynamic singularities in Raman spectra
Author(s) -
Bunkin A. F.,
Lyakhov G. A.,
Suyazov N. V.,
Pershin S. M.
Publication year - 2000
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/1097-4555(200008/09)31:8/9<857::aid-jrs621>3.0.co;2-#
Subject(s) - raman spectroscopy , sequence (biology) , spectral line , gravitational singularity , chemistry , thermodynamics , physics , optics , biochemistry , quantum mechanics
Anomalies at 0, 4, 19, 36 and 76 °C are experimentally detected in the temperature dependences of envelope widths d e and central wavenumber ν e of the water Raman spectrum in the wavenumber range around 3450 cm −1 . The statistical two‐oscillatory model relates these parameters to variations in entropy Δ S and hydrogen bond concentration Δ c as Δ d e ∝ exp(Δ S ) and Δν e ∝ Δ c . The comparison of the experimental and model temperature dependences of ν e and d e points to the possibility of structure phase transitions in water, the hydrogen bond concentration being an order parameter. Copyright © 2000 John Wiley & Sons, Ltd.