Ultrafast Dynamics of Phospholipid-Water Interfaces Studied by Nonlinear Time-Resolved Vibrational Spectroscopy /

• Κύριος συγγραφέας: Costard, René (Συγγραφέας)
• Συγγραφή απο Οργανισμό/Αρχή: SpringerLink (Online service)
• Μορφή: Ηλεκτρονική πηγή Ηλ. βιβλίο
• Γλώσσα: English
• Έκδοση: Cham : Springer International Publishing : Imprint: Springer, 2015.
• Έκδοση: 1st ed. 2015.
• Σειρά: Springer Theses, Recognizing Outstanding Ph.D. Research,
• Θέματα: Physics.; Physical chemistry.; Cell membranes.; Atomic structure.; Molecular structure.; Spectra.; Membranes (Biology) > Mechanical properties.; Spectroscopy.; Microscopy.; Membranes.; Physical Chemistry.; Membrane Biology.; Atomic/Molecular Structure and Spectra.; Spectroscopy and Microscopy.

 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. 

 Introduction -- Vibrational Spectroscopy -- Ultrafast Vibrational Dynamics of Phospholipid Hydration Sites -- Ultrafast Vibrational Dynamics of Phospholipid Hydration Shells -- Conclusions -- Appendix: Experimental Pulse Parameters.