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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

Phosphoreszenzeigensch aften von Methyl-, Chlor- und Brom-Derivaten des [2.2] Paracyclophans

  • H. Hopf and E. Hermann

Phosphorescence and fluorescence spectra, quantum yields of phosphorescence and fluorescence as well as phosphorescence lifetimes have been measured of six methyl-, chloro- and bromo-derivatives of [2.2] paracyclophane in ethanol at 77 K. While the chloro-derivatives as well as dibromo-paracyclophane exhibit a normal internal heavy-atom effect behaviour the momobromo-compound shows anomalies. These possibly indicate that in the monobromo-compound an additional pathway of the radiationless deactivation of the lowest triplet state is effective which does not occur with the other compounds.

Received: 1987-6-6
Published Online: 2014-6-2
Published in Print: 1987-9-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

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