Effects of Molecular Topology and Environment on Dynamics of Electron Transfer Processes in Porphyrin-Fullerene Hybrid Materials

有了这个奖项，有机和高分子计划支持教授大卫我的工作。舒斯特，来自纽约大学化学系。本研究将继续PI的调查，在溶液中的供体-受体系统，将卟啉和富勒烯部分的光诱导电子转移反应的动力学，作为这些基团的拓扑和空间关系的函数。目标是了解发色团间距离、分子构象、拓扑关系和环境如何影响能量转移、电荷分离和电荷重组过程的速率。待研究的材料包括共价连接的系统，主要是具有可充当分子线的炔连接基的那些，以及机械连接的系统，即，轮烷和索烃。多组分系统，其中光诱导的能量和电子转移过程逐步发生，在自然界中，将被开发为光合作用模型。合成技术的最新进展将允许构建结构上比以前可用于此类研究的材料更复杂和有趣的材料。这些材料暴露于太阳光谱区激发时发生的过程的详细机制将由PI在纽约大学的实验室以及时间分辨光谱和磁共振技术专家的合作者实验室的研究来阐述。这项工作将由学生和博士后研究员进行，他们将获得合成经验，新型纳米材料的分离和表征。PI实验室的计算研究以及纽约大学教师的理论同事也将发挥作用。这项研究的一个重要方面将是大学生的广泛参与，从大二或大三开始，在特殊情况下甚至作为新生。这些学生将接受有机化学前沿研究的培训，从基本原理和化学文献衍生的项目概念，到使用当代合成，分析和光谱方法的执行。所有同事将接受光化学，光物理和材料科学的基础。这项培训将为研究生学习和职业发展做好准备。从实用的角度来看，用于储能的太阳能电池将从本研究过程中发现的有前途的材料中合作开发。

With this award, the Organic and Macromolecular Program supports the work of Professor David I. Schuster, of the Department of Chemistry at New York University. This research will continue the PI's investigations of the dynamics of photoinduced electron transfer reactions in solution in donor-acceptor systems incorporating porphyrin and fullerene moieties, as a function of the topological and spatial relationships of these groups. The goal is to gain understanding of how interchromophoric distance, molecular conformation, topological relationships and environment affect the rates of energy transfer, charge separation and charge recombination processes. The materials to be studied included covalently-linked systems, predominantly those with alkyne linkers which can act as molecular wires, as well as mechanically-linked systems, i.e., rotaxanes and catenanes. Multicomponent systems, in which photoinduced energy and electron transfer processes take place stepwise, as in nature, will be developed as photosynthetic models. Recent advances in synthetic techniques will allow construction of structurally more complex and interesting materials than those previously available for such studies. The detailed mechanisms of the processes occurring upon exposure of these materials to excitation in the solar spectral region will be elaborated by studies in the PI's lab at NYU and in the laboratories of collaborators who are experts in time-resolved spectroscopic and magnetic resonance techniques.The work will be carried out by students and postdoctoral fellows, who will gain experience in the synthesis, isolation and characterization of novel nanoscale materials. Computational studies, in the PI's lab as well as with theory colleagues on the NYU faculty, will also play a role. An important aspect of this research will be the extensive involvement of undergraduates, beginning in their sophomore or junior years, and in special cases even as freshmen. These students will receive training in cutting-edge research in organic chemistry, from project conception derived from basic principles and the chemical literature, to execution using contemporary synthetic, analytic and spectroscopic methods. All coworkers will receive grounding in photochemical, photophysical and material sciences. This training will be excellent preparation for graduate studies and career development. From a practical point of view, solar cells for energy storage will be developed collaboratively from promising materials discovered in the course of this research.