Raman Spectroscopy of Conformational Rearrangements at Low Temperatures: Folding and Stretching of Alkanes in Supersonic Jets by Nils Olaf Bernd LüttschwagerRaman Spectroscopy of Conformational Rearrangements at Low Temperatures: Folding and Stretching of Alkanes in Supersonic Jets by Nils Olaf Bernd Lüttschwager

Raman Spectroscopy of Conformational Rearrangements at Low Temperatures: Folding and Stretching of…

byNils Olaf Bernd Lüttschwager

Hardcover | August 29, 2014

Pricing and Purchase Info

$160.36 online 
$193.50 list price save 17%
Earn 802 plum® points

Prices and offers may vary in store

Quantity:

In stock online

Ships free on orders over $25

Not available in stores

about

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 isolatedn-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.
Title:Raman Spectroscopy of Conformational Rearrangements at Low Temperatures: Folding and Stretching of…Format:HardcoverDimensions:183 pagesPublished:August 29, 2014Publisher:Springer-Verlag/Sci-Tech/TradeLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:3319085654

ISBN - 13:9783319085654

Look for similar items by category:

Reviews

Table of Contents

Introduction.- Background.- Experimental.- Unbranched n-alkanes.- Perfluorinated alkanes.- Modulus of elasticity.- Summary and outlook.- Appendix.