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.

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.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chemical Phenomena
  • Coloring Agents / chemistry*
  • Coumarins / chemistry*
  • Hydrocarbons, Chlorinated
  • Hydrogen Bonding
  • Molecular Structure
  • Solvents / chemistry
  • Spectrometry, Fluorescence
  • Spectrophotometry, Ultraviolet

Substances

  • Coloring Agents
  • Coumarins
  • Hydrocarbons, Chlorinated
  • Solvents
  • 6-amino-1,2-benzopyrone
  • 1-chloropropane