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A dendritic fullerene–porphyrin dyad
Auteur(s)
Campidelli, Stéphane
Swartz, Angela
Rahman, G. M. Aminur
Guldi, Dirk M.
Milic, Dragana
Vázquez, Ester
Prato, Maurizio
Date de parution
2006
In
Photochemical & Photobiological Sciences, Royal Society of Chemistry (RSC), 2006/5/12/1137-1141
Résumé
We describe the synthesis, characterization and photophysical properties of a fullerene derivative whose structure includes a Zn-porphyrin and a second generation liquid-crystalline (LC) dendrimer. The size of the fullerene and porphyrin units with respect to the size of the LC dendrimer prevents the formation of liquid-crystalline phases. However, this system gives interesting photoinduced electron transfer phenomena. Compound <b>1</b> has been investigated by steady state and time resolved fluorescence as well as transient absorption spectroscopy in polar and apolar solvents. We demonstrate that the fluorescence of the porphyrin unit in <b>1</b> is quenched compared to the Zn-tetraphenylporphyrin used as reference. Femto- and picosecond transient absorption permit to identify the formation of a radical ion pair while nanosecond experiments allowed the determination of the charge recombination lifetimes.
Identifiants
Type de publication
journal article
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