Raman spectroscopy of conformational rearrangements at low temperatures [electronic resource] : folding and stretching of alkanes in supersonic jets / Nils Olaf Bernd Lüttschwager.
Lüttschwager, Nils Olaf Bernd, author.
2014
QD96.R34
Available Online

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Title Raman spectroscopy of conformational rearrangements at low temperatures [electronic resource] : folding and stretching of alkanes in supersonic jets / Nils Olaf Bernd Lüttschwager.
Author Lüttschwager, Nils Olaf Bernd, author.
ISBN 9783319085661 electronic book
3319085662 electronic book
9783319085654
DOI https://doi.org/10.1007/978-3-319-08566-1
Published Cham : Springer, 2014.
Language English
Description 1 online resource (xii, 183 pages) : illustrations.
Item Number 10.1007/978-3-319-08566-1 doi
Call Number QD96.R34
Dewey Decimal Classification 543/.57
Summary 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, whilefor shorter chain lengths, a simple stretched conformation is energetically preferred. This thesis can locate the experimental turning point for the first timein aninteraction-free manner from measurements of unbranched alkanes at low temperaturesin 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 flexibilitycan bequantified. The investigations are complemented by measurements of perfluoroalkanes, and similarities and differences between the compounds are discussed. Furthermore, Nils Lüttschwagerdetermines 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 thatthe single polymer molecules can be as stiff as a rod of steel.
Note "Doctoral thesis accepted by the Georg-August-University Göttingen, Germany."
Bibliography, etc. Note Includes bibliographical references.
Access Note Access limited to authorized users.
Source of Description Online resource; title from PDF title page (SpringerLink, viewed August 27, 2014).
Series Springer theses.
Available in Other Form Print version: 9783319085654
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Introduction
Background
Experimental
Unbranched n-alkanes
Perfluorinated alkanes
Modulus of elasticity
Summary and outlook
Appendix.

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