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Investigation of the rotational motion of self-assembled fatty acid films: An electron paramagnetic resonance line shape analysis

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Risse,  Thomas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Hill,  Thomas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Schmidt,  Jörg
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Abend,  Günter
Fritz Haber Institute, Max Planck Society;

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Hamann,  Heiko
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Risse, T., Hill, T., Schmidt, J., Abend, G., Hamann, H., & Freund, H.-J. (1998). Investigation of the rotational motion of self-assembled fatty acid films: An electron paramagnetic resonance line shape analysis. The Journal of Chemical Physics, 108(20), 8615-8625. doi:10.1063/1.476292.


Cite as: http://hdl.handle.net/21.11116/0000-0007-4F0B-6
Abstract
We have investigated the electron paramagnetic resonance (EPR) of self-assembled stearic acid films adsorbed on an Al2O3-film. Doping the film with spin labels at different positions of the alkyl chain in order to make the films accessible for EPR spectroscopy provides an opportunity to investigate the rotational motion of the molecule along the alkyl chain. The temperature dependent EPR spectra show a strong dependence of the rotational motion of the molecules with variation of the location of the spin label along the chain. We study the rotational motion by means of the EPR line shape analysis.