Deactivation of 6-aminocoumarin intramolecular charge transfer excited state through hydrogen bonding

  • Int J Mol Sci. 2014 Sep 19;15(9):16628-48. doi: 10.3390/ijms150916628.
Ewa Krystkowiak  1 ,  Krzysztof Dobek  2 ,  Andrzej Maciejewski  3
Affiliations
  • 1. Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, Poznań 61-614, Poland. [email protected].
  • 2. Faculty of Physics, Adam Mickiewicz University in Poznań, Umultowska 85, Poznań 61-614, Poland. [email protected].
  • 3. Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, Poznań 61-614, Poland. [email protected].
PMID: 25244014 DOI: 10.3390/ijms150916628
Abstract

This paper presents results of the spectral (absorption and emission) and photophysical study of 6-aminocoumarin (6AC) in various aprotic hydrogen-bond forming Solvents. It was established that solvent polarity as well as hydrogen-bonding ability influence solute properties. The hydrogen-bonding interactions between S1-electronic excited solute and solvent molecules were found to facilitate the nonradiative deactivation processes. The energy-gap dependence on radiationless deactivation in aprotic Solvents was found to be similar to that in protic Solvents.

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