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保留的螺旋肽通过n末端固定在金上，并带有垂直方向。 STM观察结果表明，在偏置为-1.3 V时确定了明亮的图像，但在应用1.5 V的偏差时消失了。亮度的变化是由于3_ <10>螺旋之间的螺旋相互转换引起的，螺旋与螺旋之间的螺旋相变是通过与螺旋型偶极力量与螺旋型螺旋冠型螺旋冠型螺旋杆相互作用所诱导的。合成的，单层是在pH（NO_3）_2的水溶液上制备的。 PB2+离子与冠状醚单元形成复合物，单层成功地转移了金。用H_2S处理膜后，形成了PBS的二维网络。膜的厚度为2.4Å，显示了具有半导体特性的宽带间隙。3.18-残留的螺旋肽在C末端合成了带有二封末单元的螺旋肽，并合成了其自组装的单层……更大的是在金上形成。长时间愤怒中的电子转移反应通过天文学测量法评估，以通过螺旋肽获得转移速率。肽和金之间的界面被认为是电子转移反应中的速率确定步骤之一。4.16-残留的螺旋肽固定在金上，并以垂直方向固定，并通过STS测量确定分子电导。通过Simons模型分析I-V曲线，并确定电子传递的衰减系数为0.75Å^<-1>。合成了在I-V曲线中显示的螺旋肽。5.16二氧化螺旋肽与C末端的N-乙基甲虫基团合成，并在金上制备了它们的自组装单层。 C末端羧基对通过螺旋肽电子转移的电离对电离的影响进行了研究。分子系统表明光电流是通过更改溶液的pH进行切换的。较少的