Experimental and theoretical study of the rotational reorientation dynamics of 7-aminocoumarin derivatives in polar solvents: hydrogen-bonding effects.

@article{Zhou2009ExperimentalAT,
  title={Experimental and theoretical study of the rotational reorientation dynamics of 7-aminocoumarin derivatives in polar solvents: hydrogen-bonding effects.},
  author={Panwang Zhou and Peng Song and Jianyong Liu and Keli Han and Guozhong He},
  journal={Physical chemistry chemical physics : PCCP},
  year={2009},
  volume={11 41},
  pages={9440-9}
}
The rotational reorientation dynamics of 7-aminocoumarin derivatives with different alkylation degrees in methanol, dimethylformamide, and dimethyl sulfoxide have been investigated using femtosecond time-resolved stimulated emission pumping fluorescence depletion (FS TR SEP FD) spectroscopy. In addition to a long anisotropy decay time that accounts for the overall rotational relaxation of solutes, a short anisotropy decay time on the order of picoseconds or sub-picoseconds was also observed in… CONTINUE READING
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