Surface junction effects on the electron conduction of molecular wires.
Surface junction effects on the electron conduction of p-phenylene-bridged bis(terpyridine)iron oligomers terminated with a ferrocene moiety were quantitatively analyzed by employing three different surface-anchoring terpyridine ligands. The dependence of the electron-transfer rate constant for oxidation of the ferrocene moiety, k(et), on the distance between the electrode surface and the ferrocene moiety, x, showed that the attenuation factor, beta(d), which indicates the degree of reduction of k(et) with x, was approximately 0.018 in all cases. However, the absolute k(et) value depended strongly on both electronic and steric factors of the surface-anchoring ligand.
Department of Chemistry, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Tomochika
T
Kurita
Yoshihiko
Y
Nishimori
Fumiyuki
F
Toshimitsu
Satoshi
S
Muratsugu
Shoko
S
Kume
Hiroshi
H
Nishihara
D004553:Electric Conductivity; D004583:Electrons; D005296:Ferrous Compounds / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008024:Ligands; D008567:Membranes, Artificial; D013499:Surface Properties
D005296:Ferrous Compounds; D008024:Ligands; D008567:Membranes, Artificial; D006046:Gold