Photo-induced vectorial electron transfer through oriented metal-coordinated peptide assembly on a self-assembled monolayer

Masahiro Higuchi

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Photo-induced vectorial electron transfer through oriented metal-coordinated peptide assembly on a self-assembled monolayer

机译：通过定向金属配位肽在自组装单分子膜上进行光诱导矢量电子转移

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摘要

A vertically and unidirectionally oriented metal-coordinated α-helical peptide assembly having an amino acid sequence of Leu_2His(Co(Ⅱ))-Leu_6His(Co(Ⅱ))Leu_6-C_(60) was fabricated on a mixed self-assembled monolayer (SAM) surface consisting of amino-alkanethiol, dialkyl disulfide, and ferrocenyl alkanethiol by a stepwise polymerization of the amino acids using the modified conventional solid-phase peptide synthesis. We have demonstrated that vectorial electron transfer through the peptide assemblies on the mixed SAM. The Co(Ⅱ)-His complexes in the peptide assembly on the SAM accelerated the electron transfer coupled with the macro-dipole moment of the peptides through the assembly. Furthermore, upon photo-irradiation to the peptide assembly, electron transfer occurred from the excited ferrocenyl group on the SAM surface to the electron acceptor, C_(60), at the terminal through the metal-coordinated a-helical peptide assembly. This method has the advantage of permitting simple fabrication of oriented peptide assemblies consisting of sequential peptides having functional groups such as electron donors and acceptors at the desired positions. This system may be useful for signal transduction devices.

机译：在混合的自组装单层膜上制备了具有Leu_2His（Co（Ⅱ））-Leu_6His（Co（Ⅱ））Leu_6-C_（60）氨基酸序列的垂直单向取向的金属配位的α-螺旋肽装配体（ SAM）表面由氨基链烷硫醇，二烷基二硫键和二茂铁基链烷硫醇组成，通过使用改良的常规固相肽合成方法逐步进行氨基酸聚合。我们已经证明矢量电子通过混合SAM上的肽组装体转移。 SAM上肽装配中的Co（Ⅱ）-His配合物加速了电子传递，并通过装配使肽的大偶极矩耦合。此外，在对肽组件进行光辐照时，电子从金属表面上的受激二茂铁基团通过金属配位的α-螺旋肽组件在末端转移至电子受体C_（60）。该方法的优点是允许简单地制备由在所需位置具有官能团如电子供体和受体的连续肽组成的定向肽组件。该系统对于信号转导设备可能有用。

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《Thin Solid Films》 |2008年第12期|4312-4318|共7页
作者
Masahiro Higuchi;
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作者单位

Department of Materials Science and Technology, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-5888, Japan;

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正文语种 eng
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vertically and unidirectionally orientation; metal-coordinated peptide assembly; mixed self-assembled monolayer; stepwise polymerization; photocurrent; electrochemical properties;

机译：垂直和单向定向;金属配位肽装配;混合自组装单层;逐步聚合光电流电化学性质;

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Photo-induced vectorial electron transfer through oriented metal-coordinated peptide assembly on a self-assembled monolayer

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