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

International Journal of Molecular Sciences

卷:15

Andrzej Maciejewski¹  Ewa Krystkowiak¹  Krzysztof Dobek² 

[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;

关键词: 6-aminocoumarin;    solvatochromism;    hydrogen bonding;    donor-acceptor system;    electronic excited state;    energy gap law;   

DOI  :  10.3390/ijms150916628

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown