Mechanistic Diagnosis for Redox Switching of Electroactive Films

Stanley Bruckenstein是纽约州立大学布法罗分校的化学教授，他获得了分析和表面化学项目的更新资助，用于电活性聚合物薄膜的理论和实验研究。电化学石英晶体微平衡（EQCM）实验和动态阻抗测量将与基于立方体方案的理论考虑结合使用，该方案将产生聚合物薄膜中氧化还原开关过程中发生的基本动力学步骤的速率。该方法将允许识别和分离涉及反离子转移，合作离子转移，中性物质转移和聚合物构型变化的过程。本文所研究的氧化还原聚合物包括聚乙烯二茂铁，所研究的导电聚合物包括聚吡咯。研究将产生结构-功能的相关性内部和不同类别的聚合物之间。这种关系允许为特定目的合理设计聚合物。由于电活性聚合物在电池和膜等技术领域的重要性，对电活性聚合物的性质和过程的基本理解仍然是研究这些材料的主要目标。这项研究提供了一个理论框架，在此基础上设计实验来检查这些过程。从实验中获得的信息将使聚合物的技术发展具有明确的目的。

Stanley Bruckenstein, professor of chemistry at SUNY-Buffalo, is supported by this renewal grant from the Analytical and Surface Chemistry Program for theoretical and experimental studies of electroactive polymer thin-films. Electrochemical quartz crystal microbalance (EQCM) experiments and dynamic impedance measurements will be used in conjunction with theoretical considerations based on a scheme of cubes which will yield the rates of the elementary kinetic steps that occur during a redox switching process in the polymer films. The approach will permit the identification and separation of processes involving counterion transfer, co-ion transfer, neutral species transfer and polymer configuration changes. Polyvinylferrocene is included among the redox polymers to be studied and polypyrrole is among the conducting polymers to be used. The investigations will produce structure-function correlations within and among various classes of polymers. Such relationships permit rational design of polymers for specific purposes. A fundamental understanding of the nature and processes occuring in electroactive polymers continues to be a major objective of studies on these materials because of their importance in technological areas such as batteries and membranes. This research provides a theoretical framework upon which to design experiments to examine these processes. From the experiments, information is obtained which will allow technological development of polymers for well-defined purposes.