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Zeitschrift für Naturforschung A

A Journal of Physical Sciences

Editor-in-Chief: Holthaus, Martin

Editorial Board: Fetecau, Corina / Kiefer, Claus

IMPACT FACTOR 2016: 1.432

CiteScore 2017: 1.30

SCImago Journal Rank (SJR) 2017: 0.403
Source Normalized Impact per Paper (SNIP) 2017: 0.632

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Volume 34, Issue 6


Thermal Motion of Prolate Luminescent Molecules in Solvents with Different Viscosities

A. Kawski / J. Kamiński / J. Kukielski
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/zna-1979-0605


The emission anisotropies r of the fluorescence of the prolate molecules 4-dimethylamino-4′-nitrostilbene (DNS) and 4-amino-4′-nitrostilbene (ANS) in solvents of different viscosities η were investigated. The non-linear dependence of 1/r on T/η was confirmed. Agreement between the experimental data and theory was obtained by the assumption that the prolate luminescent molecules perform irregular rotational motions within a limited solid angle. The theory developed for prolate molecules with the emission transition moment parallel to the long axis of the molecules describes well the experimental results. Rotational relaxation times in different solvents and effective volumes of the studied molecules were obtained.

About the article

Received: 1979-02-09

Published Online: 2014-06-02

Published in Print: 1979-06-01

Citation Information: Zeitschrift für Naturforschung A, Volume 34, Issue 6, Pages 702–707, ISSN (Online) 1865-7109, ISSN (Print) 0932-0784, DOI: https://doi.org/10.1515/zna-1979-0605.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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Chemischer Informationsdienst, 1979, Volume 10, Number 37

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