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

Fluorescence Spectra and Determination of the Energy of O-O Transitions of Coumarins in Liquid Solutions

  • A. Bączyński , P. Targowski , B. Ziętek and D. Radomska


Analytical expressions of absorption and fluorescence spectra of some coumarins in ethyl alcohol at room temperature are given. Satisfactory agreement of measured and calculated spectra is obtained. It was possible to obtain the pure electronic transition energies immediately after excitation (from absorption spectra) and after the thermal and orientational equilibrium is reached (from fluorescence). An optical transition carries a dye-solvent system to a state in which the mutual interaction energy is larger than in the initial state

Received: 1989-9-29
Published Online: 2014-6-2
Published in Print: 1990-5-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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