rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Raman Spectroscopy of Conformational Rearrangements at Low Temperatures
    sub title: Folding and Stretching of Alkanes in Supersonic Jets
  name:
    name part: Lüttschwager, Nils Olaf Bernd.
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: SpringerLink (Online service)
  type of resource: text
  origin info:
    place:
      place term: gw
    date issued: 2014
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: electronic resource
    reformatting quality: access
    form: remote
    extent: XII, 183 p. 81 illus., 44 illus. in color. online resource.
  abstract: This thesis identifies the turning point in chain length, after which alkanes self-solvate into a folded structure instead of an extended stretched conformation. After this turning point, London dispersion forces rearrange isolated n-alkanes into a particular hairpin-structure, while for shorter chain lengths, a simple stretched conformation is energetically preferred. This thesis can locate the experimental turning point for the first time in an interaction-free manner from measurements of unbranched alkanes at low temperatures in supersonic jet expansions. It contains a detailed analysis of the vibrational Raman spectra of the chain molecules, which is supported by comprehensive quantum chemical simulations. In this way, the detailed balance between inter-chain attraction and conformational flexibility can be quantified.The investigations are complemented by measurements of perfluoroalkanes, and similarities and differences between the compounds are discussed. Furthermore, Nils Lüttschwager determines the stiffnesses (elastic moduli) of two of the most common industrial polymers: polyethylene and polytetrafluorethylene. He uses in this thesis a sophisticated extrapolation to calculate this value from quantities of their building blocks, showing that the single polymer molecules can be as stiff as a rod of steel.
  table of contents: Introduction -- Background -- Experimental -- Unbranched n-alkanes -- Perfluorinated alkanes -- Modulus of elasticity -- Summary and outlook -- Appendix.
  note: by Nils Olaf Bernd Lüttschwager.
  subject:
    topic: Chemistry
  subject:
    topic: Spectroscopy
  subject:
    topic: Physical chemistry
  subject:
    topic: Polymers
  subject:
    topic: Atomic structure
  subject:
    topic: Molecular structure
  subject:
    topic: Spectra
  subject:
    topic: Chemistry
  subject:
    topic: Physical Chemistry
  subject:
    topic: Atomic/Molecular Structure and Spectra
  subject:
    topic: Spectroscopy/Spectrometry
  subject:
    topic: Polymer Sciences
  classification: QD450-882
  classification: 541
  related item:
    title info:
      title: Springer eBooks
  related item:
    title info:
      title: Springer Theses, Recognizing Outstanding Ph.D. Research
  identifier: 9783319085661
  identifier: http://dx.doi.org/10.1007/978-3-319-08566-1
  record info:
    record creation date: 140816
    record change date: 20151204172223.0
    record identifier: 978-3-319-08566-1