title: Donor-Acceptor Heterojunction Configurations Based on DNA-Multichromophore Arrays.
abstract: Multichromophore arrays of bis(2-thienyl)diketopyrrolopyrrole (DPP) and naphthalenediimide (NDI) with two Zn(II) -cyclens were constructed using thymidine DNA as a scaffold through the binding of the Zn(II) -cyclens with thymine bases. We demonstrate photocurrent generation in a donor-acceptor heterojunction configuration consisting of the DPP (donor) and NDI (acceptor) arrays co-immobilized on an Au electrode. The co-immobilized electrode exhibited good photocurrent responses because of the efficient charge separation between the DPP and NDI arrays. In contrast, an immobilized electrode consisting of randomly assembled DPP-NDI arrays generated no photocurrent response because DPP formed ground-state charge-transfer complexes with NDI in the randomly assembled arrays. Therefore, our approach to generate donor-acceptor heterojunctions based on DNA-multichromophore arrays is a useful method to efficiently generate photocurrent.
authors.affiliation: Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 (Japan). mitunobu@eng.u-hyogo.ac.jp.
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Nakamura
authors.affiliation: Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 (Japan).
authors.forename: Koji
authors.initials: K
authors.lastname: Tsuto
authors.affiliation: Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 (Japan).
authors.forename: Ayumi
authors.initials: A
authors.lastname: Jomura
authors.affiliation: Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 (Japan).
authors.forename: Tadao
authors.initials: T
authors.lastname: Takada
authors.affiliation: Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 (Japan).
authors.forename: Kazushige
authors.initials: K
authors.lastname: Yamana
mesh_terms: D004247:DNA / Q000737:chemistry*; D004579:Electron Transport; D007094:Imides / Q000737:chemistry*; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013941:Thymine / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D007094:Imides; D009281:Naphthalenes; D009942:Organometallic Compounds; D011758:Pyrroles; C000606355:bis(2-thienyl)diketopyrrolopyrrole; C542131:naphthalenediimide; D004247:DNA; D015032:Zinc; D013941:Thymine
keywords: DNA; aggregation; charge-transfer; chromophores; photoelectric properties