title: Prevailing Photocurrent Generation of D-π-A Type Oligo(phenyleneethynylene) in Contact with Gold over Dexter-Type Energy-Transfer Quenching.
abstract: Photocurrent generation is observed with D-π-A type oligo(phenyleneethynylene) (OPE) physically contacting gold substrate. The OPE is conjugated with helical peptides, which helps the OPE moiety orient vertically on gold surface. This configuration makes the Dexter energy transfer difficult to occur even though one end of the D-π-A type OPE physically contacts gold. The anodic photocurrent continuously increases with increment of applying bias voltage from -0.3 to 0.5 V. The first principle calculations reveal that the increase in photocurrent generation is attributed partly to the change in the electron distributions of HOMO and LUMO of the D-π-A type OPE to be more localized with applying the positive potential.
authors: Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors: Hirotaka
authors: H
authors: Uji
authors: Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors: Taichi
authors: T
authors: Ito
authors: Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors: Mitsuaki
authors: M
authors: Matsumoto
authors: Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors: Shunsaku
authors: S
authors: Kimura
mesh_terms: D000480:Alkynes / Q000138:chemical synthesis / Q000737:chemistry*; D004560:Electricity; D004735:Energy Transfer; D004987:Ethers / Q000138:chemical synthesis / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D055668:Photochemical Processes; D011789:Quantum Theory
chemical_list: D000480:Alkynes; D004987:Ethers; C436384:phenyleneethynylene; D006046:Gold