title: Synthesis and characterization of oligoproline-based molecular assemblies for light harvesting.
abstract: Helical oligoproline arrays provide a structurally well-defined environment for building photochemical energy conversion assemblies. The use of solid-phase peptide synthesis (SPPS) to prepare four such arrays, consisting of 16, 17, 18, and 19 amino acid residues, is described here. Each array contains the chromophore [Rub'(2)m](PF(6))(2) (b' = 4,4'-diethylamidocarbonyl-2,2'-bipyridine; m = 4-methyl-2,2'-dipyridine-4'-carboxylic acid) and the electron transfer donor PTZ (phenothiazine). The arrays differ systematically in the distance between the redox-active metal complex and PTZ sites. They have been used in photophysical studies to provide insight into the distance dependence of electron transfer. (J. Am. Chem. Soc. 2004, 126, 14506-14514). This work describes the synthesis, purification, and characterization of the oligoproline arrays, including a general procedure for the synthesis of related arrays.
authors.affiliation: Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
authors.forename: W Steven
authors.initials: WS
authors.lastname: Aldridge
authors.forename: Brooks J
authors.initials: BJ
authors.lastname: Hornstein
authors.forename: Scafford
authors.initials: S
authors.lastname: Serron
authors.forename: Dana M
authors.initials: DM
authors.lastname: Dattelbaum
authors.forename: Jon R
authors.initials: JR
authors.lastname: Schoonover
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Meyer
mesh_terms: D004583:Electrons; D008027:Light; D008958:Models, Molecular; D008968:Molecular Conformation; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction; D010640:Phenothiazines / Q000737:chemistry; D010777:Photochemistry; D011392:Proline / Q000138:chemical synthesis* / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D009842:Oligopeptides; D010640:Phenothiazines; D011392:Proline; C031637:phenothiazine