Raman and infrared studies of nucleosides at high pressures: II. Cytidine
1Department of Physics & Astronomy, University of Toledo, Toledo, OH 43606 USA.
Journal of Biomolecular Structure & Dynamics
|May 25, 2002
Abstract:
Raman and mid-infrared (MIR) spectra have been recorded for crystalline cytidine at pressures up to 10 GPa at room temperature. Broadening and positive wavenumber shifts are observed for most of the Raman and MIR peaks with increasing pressure. However, some of the MIR peaks associated with hydrogen-stretching modes display a negative wavenumber shift as a result of charge transfer effects. Evidence of a phase transition near 4 GPa is presented and attributed to a change in the conformation of the five membered sugar ring.
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