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Ultrafast Dynamics of Phospholipid-Water Interfaces

Studied by Nonlinear Time-Resolved Vibrational Spectroscopy

  • Book
  • © 2015

Overview

Authors:
  1. René Costard

    1. Max-Born-Institut, Berlin, Germany

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  • Nominated as an outstanding Ph.D. thesis by the Max Born lnstitute, Berlin, Germany
  • Provides a comprehensive introduction to time-resolved vibrational spectroscopy
  • Presents direct observation of hydrogen bond dynamics around phospholipids on the natural femtosecond to picosecond timescale of molecular motions
  • Offers a detailed overview of the energy dissipation after radiative excitation of phospholipids, revealing the protective function of phospholipid hydration shells as efficient heat sinks
  • Includes supplementary material: sn.pub/extras

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (5 chapters)

  1. Front Matter

    Pages i-x
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  2. Introduction

    • RenĂ© Costard
    Pages 1-8

  3. Vibrational Spectroscopy

    • RenĂ© Costard
    Pages 9-48

  4. Ultrafast Vibrational Dynamics of Phospholipid Hydration Sites

    • RenĂ© Costard
    Pages 49-66

  5. Ultrafast Vibrational Dynamics of Phospholipid Hydration Shells

    • RenĂ© Costard
    Pages 67-93

  6. Conclusions

    • RenĂ© Costard
    Pages 95-98

  7. Back Matter

    Pages 99-103
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Keywords

About this book

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.

Authors and Affiliations

  • Max-Born-Institut, Berlin, Germany

    René Costard

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