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Int. J. Mol. Sci. 2014, 15(9), 16628-16648; doi:10.3390/ijms150916628

Deactivation of 6-Aminocoumarin Intramolecular Charge Transfer Excited State through Hydrogen Bonding

1
Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, Poznań 61-614, Poland
2
Faculty of Physics, Adam Mickiewicz University in Poznań, Umultowska 85, Poznań 61-614, Poland
3
Center for Ultrafast Spectroscopy, Adam Mickiewicz University in Poznań, Umultowska 85, Poznań 61-614, Poland
*
Author to whom correspondence should be addressed.
Received: 29 June 2014 / Revised: 29 July 2014 / Accepted: 22 August 2014 / Published: 19 September 2014
(This article belongs to the Special Issue Chemical Bond and Bonding 2015)
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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. View Full-Text
Keywords: 6-aminocoumarin; solvatochromism; hydrogen bonding; donor-acceptor system; electronic excited state; energy gap law 6-aminocoumarin; solvatochromism; hydrogen bonding; donor-acceptor system; electronic excited state; energy gap law
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Krystkowiak, E.; Dobek, K.; Maciejewski, A. Deactivation of 6-Aminocoumarin Intramolecular Charge Transfer Excited State through Hydrogen Bonding. Int. J. Mol. Sci. 2014, 15, 16628-16648.

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