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Fulgides
*The ring-closure process occurs on fast timescales <1 ps
*The ring-opening is a slower reaction on the timescale of several picoseconds
*The ring-opening reaction also proved to be sensitive to solvent effects, the environment temperature and
the specific excitation wavelength.
*Dihydroazulenes (DHA) open photochemically to form the thermally unstable vinylheptafulvenes
(VHF).
*The switching of VHF to DHA is thermally assisted.
*VHF and DHA exhibit different absorption spectra in the UV-vis. region.
*The activation barrier for thermal return of VHF to DHA (in neutral state) is reported as 28.04 kcal
mol-1
The ring-opening reaction (DHA-VHF) occurs with a high quantum yield
Fulgides VHF-DHA
Fulgides VHF-DHA
Fulgides VHF-DHA

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Fulgides VHF-DHA

  • 2. *The ring-closure process occurs on fast timescales <1 ps *The ring-opening is a slower reaction on the timescale of several picoseconds *The ring-opening reaction also proved to be sensitive to solvent effects, the environment temperature and the specific excitation wavelength.
  • 3.
  • 4. *Dihydroazulenes (DHA) open photochemically to form the thermally unstable vinylheptafulvenes (VHF). *The switching of VHF to DHA is thermally assisted. *VHF and DHA exhibit different absorption spectra in the UV-vis. region. *The activation barrier for thermal return of VHF to DHA (in neutral state) is reported as 28.04 kcal mol-1 The ring-opening reaction (DHA-VHF) occurs with a high quantum yield