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Phys. Rev. Lett. 99, 078302 (2007) [4 pages]

Distinct Water Species Confined at the Interface of a Phospholipid Membrane

Victor V. Volkov,1 D. Jason Palmer,1 and Roberto Righini1,2
1European Laboratory for Nonlinear Spectroscopy (LENS), University of Florence, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy
2Department of Chemistry, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
Received 7 December 2006; published 15 August 2007

The physics of confined water has stimulated extensive research in recent years, in particular, regarding the role of hydrogen bonding as a significant factor in the observed dynamics. In this work, two-dimensional infrared spectroscopy was employed to investigate the response of the OH moiety of water in phospholipid membrane samples. The results show strong evidence for three distinct hydrogen bonding motifs (H2O with zero, one, or both OH moieties hydrogen bonded), whose relative proportions at the membrane interface are estimated.

©2007 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.99.078302
DOI: 10.1103/PhysRevLett.99.078302
PACS: 82.53.-k; 61.25.-f; 78.47.+p
  • 82.53.-k
    Femtochemistry
  • 61.25.-f
    Studies of specific liquid structures
  • 78.47.+p
    Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
  • YEAR: 2007
KEYWORDS: biomembranes, hydrogen bonds, infrared spectra, lipid bilayers, water

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