title: Superior electron-transport ability of pi-conjugated redox molecular wires prepared by the stepwise coordination method on a surface.
abstract: Electronic conductivity of molecular wires is a critical fundamental issue in molecular electronics. pi-Conjugated redox molecular wires with the superior long-range electron-transport ability could be constructed on a gold surface through the stepwise ligand-metal coordination method. The beta(d) value, indicating the degree of decrease in the electron-transfer rate constant with distance along the molecular wire between the electrode and the redox active species at the terminal of the wire, were 0.008-0.07 A(-1) and 0.002-0.004 A(-1) for molecular wires of bis(terpyridine)iron and bis(terpyridine)cobalt complex oligomers, respectively. The influences on beta(d) by the chemical structure of molecular wires and the terminal redox units, temperature, electric field, and electrolyte concentration were clarified. The results indicate that facile sequential electron hopping between neighboring metal-complex units within the wire is responsible for the high electron-transport ability.
authors: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors: Yoshihiko
authors: Y
authors: Nishimori
authors: Katsuhiko
authors: K
authors: Kanaizuka
authors: Tomochika
authors: T
authors: Kurita
authors: Toshiaki
authors: T
authors: Nagatsu
authors: Yu
authors: Y
authors: Segawa
authors: Fumiyuki
authors: F
authors: Toshimitsu
authors: Satoshi
authors: S
authors: Muratsugu
authors: Mitsuya
authors: M
authors: Utsuno
authors: Shoko
authors: S
authors: Kume
authors: Masaki
authors: M
authors: Murata
authors: Hiroshi
authors: H
authors: Nishihara
mesh_terms: D055664:Electrochemical Techniques / Q000379:methods*; D004579:Electron Transport; D005296:Ferrous Compounds / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D000075163:Metallocenes; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry*; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D005296:Ferrous Compounds; D000075163:Metallocenes; D009942:Organometallic Compounds; D011108:Polymers; D011725:Pyridines; C445104:bis(terpyridine)cobalt(II) chloride; D007501:Iron; C004998:ferrocene