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Issue 12, 2006
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A dendritic fullerene–porphyrin dyad

Stéphane Campidelli,*ab  Robert Deschenaux,b  Angela Swartz,c  G. M. Aminur Rahman,c  Dirk M. Guldi,*c  Dragana Milic,d  Ester Vázqueze  and  Maurizio Prato*a 
Author affiliations

* Corresponding authors

a Dipartimento di Scienze Farmaceutiche, Università degli Studi di Trieste, Piazzale Europa 1, Trieste, Italy
E-mail: scampidelli@units.it, prato@units.it

b Institut de Chimie, Université de Neuchâtel, Avenue de Bellevaux 51, CP 158, Neuchâtel, Switzerland

c Friedrich-Alexander-Universität Erlangen-Nürnberg Universität Erlangen, Institute for Physical and Theoretical Chemistry, Egerlandstrasse 3, Erlangen, Germany
E-mail: guldi@chemie.uni-erlangen.de

d Faculty of Chemistry, University of Belgrade, POB 158, Belgrade

e Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad Castilla-La Mancha, Ciudad Real, Spain

Abstract

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 1 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 1 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.

Graphical abstract: A dendritic fullerene–porphyrin dyad

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Publication details

The article was received on 01 Aug 2006, accepted on 14 Sep 2006 and first published on 05 Oct 2006


Article type: Paper
DOI: 10.1039/B610881D
Citation: Photochem. Photobiol. Sci., 2006,5, 1137-1141
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    A dendritic fullerene–porphyrin dyad

    S. Campidelli, R. Deschenaux, A. Swartz, G. M. A. Rahman, D. M. Guldi, D. Milic, E. Vázquez and M. Prato, Photochem. Photobiol. Sci., 2006, 5, 1137
    DOI: 10.1039/B610881D

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