Self-diffusion in molecular liquids: Medium-chain n-alkanes and coenzyme Q(10) studied by quasielastic neutron scattering

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Details zur Publikation

Autorinnen und Autoren: Smuda C, Busch S, Gemmecker G, Unruh T
Zeitschrift: Journal of Chemical Physics
Verlag: AMER INST PHYSICS
Jahr der Veröffentlichung: 2008
Band: 129
Heftnummer: 1
ISSN: 0021-9606
eISSN: 1089-7690


Abstract


A systematic time-of-flight quasielastic neutron scattering (TOF-QENS) study on diffusion of n-alkanes in a melt is presented for the first time. As another example of a medium-chain molecule, coenzyme Q(10) is investigated in the same way. The data were evaluated both in the frequency and in the time domain. TOF-QENS data can be satisfactorily described by different models, and it turned out that the determined diffusion coefficients are largely independent of the applied model. The derived diffusion coefficients are compared with values measured by pulsed-field gradient nuclear magnetic resonance (PFG-NMR). With increasing chain length, an increasing difference between the TOF-QENS diffusion coefficient and the PFG-NMR diffusion coefficient is observed. This discrepancy in the diffusion coefficients is most likely due to a change of the diffusion mechanism on a nanometer length scale for molecules of medium-chain length. (C) 2008 American Institute of Physics.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Einrichtungen weiterer Autorinnen und Autoren

Technische Universität München (TUM)


Zitierweisen

APA:
Smuda, C., Busch, S., Gemmecker, G., & Unruh, T. (2008). Self-diffusion in molecular liquids: Medium-chain n-alkanes and coenzyme Q(10) studied by quasielastic neutron scattering. Journal of Chemical Physics, 129(1). https://dx.doi.org/10.1063/1.2943673

MLA:
Smuda, Christoph, et al. "Self-diffusion in molecular liquids: Medium-chain n-alkanes and coenzyme Q(10) studied by quasielastic neutron scattering." Journal of Chemical Physics 129.1 (2008).

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