Dynamics of Electron Hopping and Translational Diffusion in Monolayers at the Air/Water Interface

有组织的分子系统（如生物膜）的建模，使用空气/水界面的单层组件，形成了本研究项目的主题，由分析和表面化学项目支持。有组织的多分子结构中的电子跳跃和分子在水面上的横向平移扩散是本工作的两个主要研究课题。Langmuir-Blodgett技术、Brewster角度显微镜和涉及“线”微电极的二维电化学是这些研究中使用的主要实验工具。在这些有组织的单分子层中，电子跳变率与供体-受体对取向的关系将被确定。研究了水动力耦合和界面层粘度对表面活性剂分子在水面扩散的影响。这些信息将有助于了解分子和电子通过重要的生物膜系统的传输。在空气/水界面形成的分子单层组装是本项目研究的重点。电子和表面活性剂分子在这些模型系统中的横向运动将使用各种光学和电化学方法进行探索。这些信息将有助于开发生物和电分析系统中重要的膜运输模型。

The modelling of organized molecular systems such as biological membranes, using monolayer assemblies at the air/water interface, forms the subject of this research project supported by the Analytical and Surface Chemistry program. Electron hopping in organized multimolecular structures, and lateral translational diffusion of molecules on the water surface are the two main topics of investigation in this work. Langmuir-Blodgett techniques, Brewster angle microscopy, and 2D electrochemistry involving "line" microelectrodes are the principal experimental tools used in these studies. The dependence of electron hopping rate on orientation of the donor- acceptor pair in these organized monolayers will be determined. The effects of hydrodynamic coupling and viscosity of the interfacial layer on the diffusion of surfactant molecules on the water surface will be investigated as well. This information will help to develop an understanding of molecular and electron transport through biologically important membrane systems. Molecular monolayer assemblies formed at the air/water interface are the focus of the research of this project. The lateral motion of electrons and surfactant molecules in these model systems will be explored using a variety of optical and electrochemical methods. This information will be useful for developing models of membrane transport of importance in biological and electroanalytical systems.