TY - JOUR
T1 - Superior electron-transport ability of π-conjugated redox molecular wires prepared by the stepwise coordination method on a surface
AU - Nishimori, Yoshihiko
AU - Kanaizuka, Katsuhiko
AU - Kurita, Tomochika
AU - Nagatsu, Toshiaki
AU - Segawa, Yu
AU - Toshimitsu, Fumiyuki
AU - Muratsugu, Satoshi
AU - Utsuno, Mitsuya
AU - Kume, Shoko
AU - Murata, Masaki
AU - Nishihara, Hiroshi
PY - 2009/8/3
Y1 - 2009/8/3
N2 - Electronic conductivity of molecular wires is a critical fundamental issue in molecular electronics. π-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 βd 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 Å-1 and 0.002-0.004 Å-1 for molecular wires of bis(terpyridine)iron and bis(terpyridi-ne)cobalt complex oligomers, respec- tively. The influences on βd 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 metalcomplex units within the wire is responsible for the high electron-transport ability.
AB - Electronic conductivity of molecular wires is a critical fundamental issue in molecular electronics. π-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 βd 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 Å-1 and 0.002-0.004 Å-1 for molecular wires of bis(terpyridine)iron and bis(terpyridi-ne)cobalt complex oligomers, respec- tively. The influences on βd 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 metalcomplex units within the wire is responsible for the high electron-transport ability.
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U2 - 10.1002/asia.200900072
DO - 10.1002/asia.200900072
M3 - Article
C2 - 19544346
AN - SCOPUS:68349154822
VL - 4
SP - 1361
EP - 1367
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
SN - 1861-4728
IS - 8
ER -