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Issue 5, 2011
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Freezing single molecule dynamics on interfaces and in polymers

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Abstract

Heterogeneous line broadening and spectral diffusion of the fluorescence emission spectra of perylene diimide molecules have been investigated by means of time dependent single molecule spectroscopy. The influence of temperature and environment has been studied and reveals strong correlation to spectral diffusion processes. We followed the freezing of the molecular mobility of quasi free molecules on the surface upon temperature lowering and by embedding into a poly(methyl methacrylate) (PMMA) polymer. Thereby changes of optical transition energies as a result of both intramolecular changes of conformation and external induced dynamics by the surrounding polymer matrix could be observed. Simulations of spectral fluctuations within a two-level system (TLS) model showed good agreement with the experimental findings.

Graphical abstract: Freezing single molecule dynamics on interfaces and in polymers

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Publication details

The article was received on 04 Sep 2010, accepted on 03 Nov 2010 and first published on 08 Dec 2010


Article type: Paper
DOI: 10.1039/C0CP01713B
Citation: Phys. Chem. Chem. Phys., 2011,13, 1754-1761
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    Freezing single molecule dynamics on interfaces and in polymers

    S. Krause, P. F. Aramendia, D. Täuber and C. von Borczyskowski, Phys. Chem. Chem. Phys., 2011, 13, 1754
    DOI: 10.1039/C0CP01713B

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