Abstract
A redox-active adlayer consisting of cobalt ions and terpyridine ligands, 4′,4′′′′-(1,4-phenylene)bis(2,2′:6′,2′′-terpyridine), was prepared on a Au(111) surface by a stepwise coordination method. The obtained adlayer produced a well-defined, stable redox wave associated with cobalt ions coordinated to 4′,4′′′′-(1,4-phenylene)bis(2,2′:6′,2′′-terpyridine), as compared to a tetra-2-pyridinyl-pyrazine adlayer, for which no redox wave was observed. In situ scanning tunneling microscopy revealed a structural change in the redox-active adlayer consisting of 4′,4′′′′-(1,4-phenylene)bis(2,2′:6′,2′′-terpyridine) and cobalt ions. It was found that the ability of cobalt ions to coordinate on Au(111) was clearly dependent on the chemical structure of the ligand, suggesting that ligand coordination with metal ions on the Au surface is determined by the molecular orientation and configuration of the ligand when the ligand is adsorbed on a Au substrate.
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Acknowledgments
This work was supported in part by a Grant-in-Aid for Scientific Research on Innovative Areas (“Coordination Programming” Area 2107, No. 21108005) from MEXT, Japan, and by the Japan Science and Technology Agency (JST) program, ‘Special Coordination Funds for Promoting Science and Technology’.
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This paper is dedicated to Prof. Dr. Hiroshi Nishihara for his outstanding contribution to the field of metal-containing polymers.
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Yoshimoto, S., Nishiyama, K. One-Pot Formation of a Metallosupramolecularly Assembled and Redox-Active Adlayer at the Solid–Liquid Interface. J Inorg Organomet Polym 23, 233–238 (2013). https://doi.org/10.1007/s10904-012-9743-3
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DOI: https://doi.org/10.1007/s10904-012-9743-3