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Control of Electron Transfer through Molecular WireBased on Molecular Dipole Engineering

基于分子偶极工程的分子线电子传递控制

基本信息

批准号：
15350068
负责人：
KIMURA Shunsaku
金额：
$ 8.13万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

1.12-Residue helical peptides were immobilized on gold via N terminal with vertical orientation. STM observation revealed that bright images were identified under bias of -1.3 V, but they disappeared upon applying bias of 1.5 V. The change of the brightness is due to the helix interconversion between 3_<10> helix and a helix, which was induced by interaction of the helical dipole moment with the electric field applied to the helical peptide.2.25-Residue helical peptide with a crown ether unit at C terminal was synthesized, and the monolayer was prepared on aqueous solution of Ph(NO_3)_2. Pb2+ ions formed complex with the crown ether units, and the monolayer was successfully transferred on gold. After treating the membrane with H_2S, 2-dimensional network of PbS was formed. The thickness of the membrane was 2.4Å showing a wide band gap with a semiconductor property.3.18-Residue helical peptides with a ferrocene unit at C terminal were synthesized, and their self-assembled monolayers wer … More e formed on gold. The electron transfer reactions in a long rage were evaluated by chronoamperometry to obtain the transfer rates through helical peptides. The interface between the peptide and gold is considered to be one of the rate-determining steps in the electron transfer reaction.4.16-Residue helical peptides were immobilized on gold with vertical orientation, and the molecular conductance was determined by STS measurements. The I-V curve was analyzed by Simons model, and the attenuation coefficient of the electron transfer was determined to be 0.75Å^<-1>. The helical peptide with a ferrocene unit showed rectification in the I-V curve.5.16-Residue helical peptides with an N-ethyl carbazolyl group at C terminal were synthesized, and their self-assembled monolayers were prepared on gold. The effect of ionization of the C terminal carboxyl group on the electron transfer through the helical peptide was studied. The molecular system demonstrated that the photocurrent was switched by changing the pH of the solution. Less

1.12-将残基螺旋肽通过N端垂直定向固定在金载体上。STM观察表明，在-1.3V偏压下，可以识别出明亮的图像，但在施加1.5V偏压时，它们消失。亮度的变化是由于3_helix和a helix之间的螺旋相互转换<10>，这是由螺旋偶极矩与施加到螺旋肽的电场的相互作用引起的。2.25-合成了C端带有冠醚单元的残基螺旋肽，并在硝酸苯溶液中制备了单分子膜。Pb ~（2+）离子与冠醚单元形成络合物，成功地将单分子膜转移到金表面。经H_2S处理后，PbS形成了二维网状结构。3.18-末端含有二茂铁单元的螺旋肽的合成及其自组装单分子膜的制备 ...更多信息 e在黄金上形成。用计时电流法研究了长时间的电子转移反应，得到了螺旋肽的电子转移速率。肽与金之间的界面被认为是电子转移反应中的速率决定步骤之一。4. 16-将残基螺旋肽垂直定向固定在金上，并通过STS测量确定分子电导。用Simons模型分析了I-V曲线，确定了电子转移的衰减系数为0.75 Ω/cm<-1>。含二茂铁单元的螺旋肽在I-V曲线上表现为整流。5.合成了C端含N-乙基咔唑基的16个残基的螺旋肽，并在金表面制备了自组装膜。研究了C端羧基电离对螺旋肽电子转移的影响。该分子系统表明，光电流的切换通过改变溶液的pH值。少