Structural Origins of Electron Transfer Rates Across Self-Assembled Monolayers

9412720 Chidsey这项研究项目解决了跨界面的长距离电子转移速率的结构来源。它得到了分析和表面化学计划的支持，目的是了解介入和周围材料在金属电极和精确定位的电活性物种之间的电子转移中的作用。在这些研究中，将考察连续介质模型作为理解和预测电子转移的活化势垒的基础，将考察位于金属和极性电解液之间的电活性物种的作用，并将探讨间隔材料的电子态对电子转移的影响。金电极上的硫醇单分子膜构成了这些电子转移研究的基础。这些测量将对新的传感器和显示技术的发展产生影响，并将有助于理解从生物学到微电子学的各种应用中的界面电荷转移。为了了解电极和电活性物种之间的电荷转移速率和机理，人们发展了许多模型方法。一种非常有前景的方法是使用自组装单分子膜技术来定位电活性物种，并控制发生电子转移的介质的结构和电子性质。这里支持的工作使用这种方法来检查跨界面的电荷转移速率的结构起源。这一领域的知识对于理解生物膜电荷转移的机制以及开发新的传感和显示技术至关重要。这里支持的工作将有助于这一谅解的发展。

9412720 Chidsey This research project addresses the structural origins of the rates of long distance electron transfer across interfaces. It is supported by the Analytical and Surface Chemistry program, with a goal of understanding the role of intervening and surrounding material in the transfer of electrons between a metal electrode and a precisely positioned electroactive species. The continuum dielectric model will be examined as a basis for understanding and predicting the activation barrier to electron transfer, the role of electroactive species located between the metal and the polar electrolyte will be examined, and the effect of electronic states of the spacer material on electron transfer will be probed in these studies. Thiol monolayers on gold electrodes form the basis for these electron transfer studies. These measurements will have impact on the development of new sensor and display technologies, and will help to develop an understanding of interfacial charge transfer in applications ranging from biology to microelectronics. %%% In order to understand the rates and mechanisms of charge transfer between electrodes and electroactive species, a number of model approaches have been developed. One very promising approach uses self assembled monolayer technology to position the electroactive species and to control the structure and electronic properties of the medium through which electron transfer occurs. The work supported here uses this approach to examine the structural origins of the rates of charge transfer across interfaces. Knowledge in this area is crucial to understanding the mechanisms of biological membrane charge transfer, and in the development of new sensing and display technologies. The work supported here will contribute to the development of this understanding.