Download e-book for iPad: Raman Spectroscopy of Conformational Rearrangements at Low by Nils Olaf Bernd Lüttschwager

By Nils Olaf Bernd Lüttschwager

This thesis identifies the turning element in chain size, and then alkanes self-solvate right into a folded constitution rather than a longer stretched conformation. After this turning element, London dispersion forces rearrange remoted n-alkanes right into a specific hairpin-structure, while for shorter chain lengths, an easy stretched conformation is energetically most popular. This thesis can find the experimental turning aspect for the 1st time in an interaction-free demeanour from measurements of unbranched alkanes at low temperatures in supersonic jet expansions. It includes a particular research of the vibrational Raman spectra of the chain molecules, that is supported by way of entire quantum chemical simulations. during this means, the distinct stability among inter-chain allure and conformational flexibility can be quantified. The investigations are complemented through measurements of perfluoroalkanes and similarities and alterations among the compounds are mentioned. additionally, Nils Lüttschwager determines the stiffnesses (elastic moduli) of 2 of the most typical business polymers: polyethylene and polytetrafluorethylene. He makes use of during this thesis a cosmopolitan extrapolation to calculate this worth from amounts in their construction blocks, exhibiting that the unmarried polymer molecules could be as stiff as a rod of steel.

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Get Raman Spectroscopy of Conformational Rearrangements at Low PDF

This thesis identifies the turning aspect in chain size, and then alkanes self-solvate right into a folded constitution rather than a longer stretched conformation. After this turning element, London dispersion forces rearrange remoted n-alkanes right into a specific hairpin-structure, while for shorter chain lengths, an easy stretched conformation is energetically hottest.

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


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