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Soils --- Phosphates --- Plant-soil relationships --- Phosphorus content

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This thesis presents a highly innovative study of the ultrafast structural and vibrational dynamics of hydrated phospholipids, the basic constituents of cell membranes. As a novel approach to the water-phospholipid interface, the author studies phosphate vibrations using the most advanced methods of nonlinear vibrational spectroscopy, including femtosecond two-dimensional infrared spectroscopy. He shows for the first time that the structure of interfacial water undergoes very limited fluctuations on a 300 fs time scale and that the lifetimes of hydrogen bonds with the phospholipid are typically longer than 10 ps. Such properties originate from the steric hindrance of water fluctuations at the interface and the orienting action of strong electric fields from the phospholipid head group dipoles. In an extensive series of additional experiments, the vibrational lifetimes of the different vibrations and the processes of energy dissipation are elucidated in detail.

Physics. --- Membranes. --- Physical Chemistry. --- Membrane Biology. --- Atomic/Molecular Structure and Spectra. --- Spectroscopy and Microscopy. --- Chemistry, Physical organic. --- Cell membranes. --- Physique --- Membrane cellulaire --- Biological interfaces. --- Phospholipids -- Spectra. --- Phospholipids. --- Cytology --- Microbiology & Immunology --- Biology --- Health & Biological Sciences --- Phospholipids --- Spectra. --- Phosphatides --- Biointerfaces --- Biological surfaces --- Biosurfaces --- Interfaces, Biological --- Surface sciences (Biology) --- Surfaces (Biology) --- Physical chemistry. --- Atomic structure. --- Molecular structure. --- Spectroscopy. --- Microscopy. --- Biological and Medical Physics, Biophysics. --- Biochemistry --- Biophysics --- Surface chemistry --- Membrane lipids --- Phosphates --- Chemistry, Physical organic --- Chemistry, Organic --- Chemistry, Physical and theoretical --- Cell surfaces --- Cytoplasmic membranes --- Plasma membranes --- Plasmalemma --- Membranes (Biology) --- Glycocalyces --- Biophysics. --- Biological physics. --- Cell membranes . --- Atomic structure  . --- Molecular structure . --- Analysis, Microscopic --- Light microscopy --- Micrographic analysis --- Microscope and microscopy --- Microscopic analysis --- Optical microscopy --- Optics --- Analysis, Spectrum --- Spectra --- Spectrochemical analysis --- Spectrochemistry --- Spectrometry --- Spectroscopy --- Chemistry, Analytic --- Interferometry --- Radiation --- Wave-motion, Theory of --- Absorption spectra --- Light --- Spectroscope --- Structure, Molecular --- Chemical structure --- Structural bioinformatics --- Structure, Atomic --- Atomic theory --- Chemistry, Theoretical --- Physical chemistry --- Theoretical chemistry --- Chemistry --- Biological physics --- Medical sciences --- Physics --- Qualitative --- Analytical chemistry