title: Dendronized fullerene-porphyrin conjugates in ortho, meta, and para positions: a charge-transfer assay.
abstract: The physicochemical characterization, that is, ground and excited state, of a new series of dendronized porphyrin/fullerene electron donor-acceptor conjugates in nonaqueous and aqueous environments is reported. In contrast to previous work, we detail the charge-separation and charge-recombination dynamics in zinc and copper metalloporphyrins as a function of first- and second-generation dendrons as well as a function of ortho, meta, and para substitution. Both have an appreciable impact on the microenvironments of the redox-active constituents, namely the porphyrins and the fullerenes. As a matter of fact, the resulting charge-transfer dynamics were considerably impacted by the interplay between the associated forces that reach from dendron-induced shielding to dipole-charge interactions.
authors.affiliation: Department of Chemistry and Pharmacy, Interdisciplinary Center of Molecular Materials, Friedrich-Alexander Universität Erlangen Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany.
authors.forename: Evangelos
authors.initials: E
authors.lastname: Krokos
authors.forename: Christina
authors.initials: C
authors.lastname: Schubert
authors.forename: Fabian
authors.initials: F
authors.lastname: Spänig
authors.forename: Michaela
authors.initials: M
authors.lastname: Ruppert
authors.forename: Andreas
authors.initials: A
authors.lastname: Hirsch
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Guldi
mesh_terms: D003300:Copper / Q000737:chemistry; D050091:Dendrimers / Q000737:chemistry*; D004579:Electron Transport; D037741:Fullerenes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D011166:Porphyrins / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry
chemical_list: D050091:Dendrimers; D037741:Fullerenes; D011166:Porphyrins; D003300:Copper; D015032:Zinc