Temperature influence on the dipalmitoylphosphatidylcholyne - Model membranes studied by FTIR

Korkmaz, F.
Severcan, Feride
Aflori, M.
Dorohoi, D. O.
Lyotropic liquid crystals are realized from certain concentration of amphiphilic molecules, such as phospholipids, in water. The specific interactions in which water is involved are very important for model-membrane stability. Dipalmitoylphosphatidylcholyne (DPPC) model membranes have been studied by FTIR technique at different temperatures in the spectral range {2500 - 4000} cm(-1). A Gaussian deconvolution has been performed in order to study the water behaviour from the point of view of hydrogen-bond formation between water molecules and both the hydrophilic heads of phospholipids and the components of buffer solution. This study contributes to the understanding the mechanisms which assure the model membrane stability.


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The temperature induced modifications in the lipid bilayers in water were studied by using 2D-FTIR Correlation Spectroscopy. The spectral range analysed in this paper corresponds to symmetric and asymmetric stretching vibrations of the -CH2 groups from the acyl chains of DPPC. Autocorrelation peaks at 2916 cm(-1) and 2848.5 cm(-1) and asynchrone modifications in the spectral ranges 2916-3000 cm(-1) and 2848-3000 cm(-1) were evidenced. The revealed modifications indicate changes in the conformers of the hydr...
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Citation Formats
F. Korkmaz, F. Severcan, M. Aflori, and D. O. Dorohoi, “Temperature influence on the dipalmitoylphosphatidylcholyne - Model membranes studied by FTIR,” DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES, pp. 55–61, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55293.