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  • Title: Modulation of Interfacial Hydration by Carbonyl Groups in Lipid Membranes.
    Author: Pérez HA, Cejas JP, Rosa AS, Giménez RE, Disalvo EA, Frías MA.
    Journal: Langmuir; 2020 Mar 17; 36(10):2644-2653. PubMed ID: 32073276.
    Abstract:
    The lack of carbonyl groups and the presence of ether bonds give the lipid interphase a different water organization around the phosphate groups that affects the compressibility and electrical properties of lipid membranes. Generalized polarization of 1,2-di-O-tetradecyl-sn-glycero-3-phosphocholine (14:0 diether PC) in correlation with Fourier transform infrared (FTIR) analysis indicates a higher level of polarizability of water molecules in the membrane phase around the phosphate groups both below and above Tm. This reorganization of water promotes a different response in compressibility and dipole moment of the interphase, which is related to different H bonding of water molecules with phosphates (PO) and carbonyl (CO) groups.
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