| 論文名 |
Complexation-induced control of electron propagation based on bounded diffusion through nanopore-tethered ferrocenes. |
| 著者 |
Feng Li
Takashi Ito
|
| キーワード |
|
| 出版年月 |
1970年1月 |
| 発表先 |
J Am Chem Soc. 2013 Nov 6;135(44):16260-3. |
| WEBサイト |
|
| 論文概要（和文） |
ナノポアでつながれたフェロセンを通る束縛された拡散に基づく電子伝播の錯化誘発制御。 |
| 論文概要（英文） |
This paper reports complexation-induced control of electron propagation based on bounded diffusion through ferrocene moieties that are covalently tethered onto nanopores (19 or 24 nm in diameter) derived from cylinder-forming polystyrene-poly(methylmethacrylate) diblock copolymers. The nanopores are oriented vertically and attach to a gold surface, and thus allow a faradaic current originating from the bounded diffusion to be measured using cyclic voltammetry. Such faradaic current decreases with increasing concentration of β-cyclodextrin (β-CD) in an aqueous solution, and recovers upon addition of excess 1-adamantanol as a competitive guest to the solution. These observations indicate that electron propagation can be reversibly inhibited by the formation of an inclusion complex with the surface-tethered redox moieties. Interestingly, the decrease in faradaic current is observed at an unexpectedly low β-CD concentration (ca. 1 × 10(-7) M) due to the enhanced partition of β-CD into the nanopores. These results will lead to designing highly sensitive molecular switches and electrochemical sensors based on the control of bounded diffusion by the host-guest chemistry of nanopore-tethered redox moieties. |
