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

分子拓扑和环境对卟啉-富勒烯杂化材料电子传递过程动力学的影响

• 批准号: 0647334
• 负责人: David Schuster
• 金额: $ 44.84万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0647334&HistoricalAwards=false
• 关键词: Effects; Molecular; Topology; Environment; Dynamics

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.

有机和高分子项目通过该奖项支持纽约大学化学系 David I. Schuster 教授的工作。这项研究将继续 PI 对包含卟啉和富勒烯部分的供体-受体系统中溶液中光致电子转移反应动力学的研究，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。要研究的材料包括共价连接系统，主要是具有可充当分子线的炔连接体的系统，以及机械连接系统，即轮烷和索烷。多组分系统将被开发为光合作用模型，其中光诱导能量和电子转移过程像自然界一样逐步发生。合成技术的最新进展将允许构建比以前可用于此类研究的结构更复杂和更有趣的材料。这些材料暴露在太阳光谱区域激发时发生的过程的详细机制将通过纽约大学 PI 实验室以及时间分辨光谱和磁共振技术专家合作者实验室的研究来详细阐述。这项工作将由学生和博士后研究员进行，他们将获得新型材料的合成、分离和表征方面的经验。 纳米级材料。 PI 实验室以及纽约大学教师的理论同事的计算研究也将发挥作用。这项研究的一个重要方面是本科生的广泛参与，从大二或大三开始，在特殊情况下甚至是新生。这些学生将接受有机化学前沿研究的培训，从基于基本原理和化学文献的项目构思，到使用当代合成、分析和光谱方法的执行。所有同事都将获得光化学、光物理和材料科学的基础知识。该培训将为研究生学习和职业发展做好良好的准备。从实用角度来看，用于储能的太阳能电池将由本研究过程中发现的有前景的材料合作开发。