title: Photoinduced electron transfer within porphyrin-containing poly(amide) dendrimers.
abstract: The synthesis and photophysical characterization of a series of free base porphyrin-containing polyamide dendrimers terminated with anthraquinone groups (FbP-Ga-AQ(n)(), a = 1-3, n = 12, 36, 108) are described. Substantial quenching (58-75%) of the porphyrin fluorescence of FbP-Ga-AQ(n)() is observed when compared to the analogous ethyl-terminated dendrimers (FbP-Ga-Et(n)()) in steady-state fluorescence experiments and is attributed to intramolecular electron transfer. Time-resolved fluorescence experiments were fit to 2-3 exponentials, indicating multiple orientations for electron transfer, consistent with the flexible nature of these dendrimers.
authors.affiliation: Department of Chemistry, Knight Chemical Laboratory, The University of Akron, Akron, Ohio 44325-3601, USA.
authors.forename: G J
authors.initials: GJ
authors.lastname: Capitosti
authors.forename: S J
authors.initials: SJ
authors.lastname: Cramer
authors.forename: C S
authors.initials: CS
authors.lastname: Rajesh
authors.forename: D A
authors.initials: DA
authors.lastname: Modarelli