Electron transfer through organic monolayer films with oligoglycine spacers

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• 作者：Slawomir Sek ; Robert Moszynski ; Anna Sepiol ; Aleksandra Misicka ; Renata Bilewicz ; ^{bilewicz@chem.uw.edu.pl}
• 关键词：Chemically modified electrodes ; Monolayers ; Peptide ; Electron transfer
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2003
• 出版时间：5 June 2003
• 年：2003
• 卷：550-551
• 期：Complete
• 页码：359-364
• 全文大小：306 K

文摘

Self-assembled monolayers were designed as model systems for the investigation of electron transfer mediated by peptide chains. A thiol derivative containing a cysteamine linker, four glycine residues and a ferrocene head group¡ªFc-(CO)-(Gly)₄-NH-(CH₂)₂-SH, was synthesized and used for preparation of monolayer assemblies. Electrochemical methods were employed to measure the electron transfer rates through one-component oligoglycine monolayers and through mixed monolayers with oligoglycine molecules (0.2?.5 % ) embedded in the alkanethiol matrix. The standard rate constant for electron tunneling through the pure oligolglycine monolayer (821¡À78 s^?) is larger than that through the mixed monolayer with alkanethiols as the main component (36¡À7 s^?) and larger than for the corresponding alkanethiol monolayer (12 s^?).