title: A DNA-directed light-harvesting/reaction center system.
abstract: A structurally and compositionally well-defined and spectrally tunable artificial light-harvesting system has been constructed in which multiple organic dyes attached to a three-arm-DNA nanostructure serve as an antenna conjugated to a photosynthetic reaction center isolated from Rhodobacter sphaeroides 2.4.1. The light energy absorbed by the dye molecules is transferred to the reaction center, where charge separation takes place. The average number of DNA three-arm junctions per reaction center was tuned from 0.75 to 2.35. This DNA-templated multichromophore system serves as a modular light-harvesting antenna that is capable of being optimized for its spectral properties, energy transfer efficiency, and photostability, allowing one to adjust both the size and spectrum of the resulting structures. This may serve as a useful test bed for developing nanostructured photonic systems.
authors.affiliation: Department of Chemistry and Biochemistry and ‡The Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.
authors.forename: Palash K
authors.initials: PK
authors.lastname: Dutta
authors.forename: Symon
authors.initials: S
authors.lastname: Levenberg
authors.forename: Andrey
authors.initials: A
authors.lastname: Loskutov
authors.forename: Daniel
authors.initials: D
authors.lastname: Jun
authors.forename: Rafael
authors.initials: R
authors.lastname: Saer
authors.forename: J Thomas
authors.initials: JT
authors.lastname: Beatty
authors.forename: Su
authors.initials: S
authors.lastname: Lin
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Neal W
authors.initials: NW
authors.lastname: Woodbury
authors.forename: Hao
authors.initials: H
authors.lastname: Yan
mesh_terms: D004396:Coloring Agents / Q000737:chemistry / Q000378:metabolism; D004247:DNA / Q000737:chemistry / Q000378:metabolism*; D004735:Energy Transfer; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry / Q000378:metabolism*; D012242:Rhodobacter sphaeroides / Q000737:chemistry / Q000378:metabolism*
chemical_list: D004396:Coloring Agents; D045322:Photosynthetic Reaction Center Complex Proteins; D004247:DNA