Comparative studies of electronic structure and dynamic process in model photosynthetic complexes using spectral hole burning and single complex spectroscopies

使用光谱烧孔和单一复合物光谱对模型光合复合物中的电子结构和动态过程进行比较研究

• 批准号: 0907958
• 负责人: Ryszard Jankowiak
• 金额: $ 38万
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-15 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907958&HistoricalAwards=false
• 关键词: Comparative; studies; electronic; structure; dynamic

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Under this award, supported by the Experimental Physical Chemistry Program of the Chemistry Division, Professor Ryszard Jankowiak from Kansas State University will use spectral hole-burning (SHB) and single photosynthetic complex spectroscopy (SPCS) to study excitonic structure and excitation energy transfer (EET) processes in two photosynthetic complexes from the cyanobacterium Synechocystis. It is anticipated that information from SBH data will provide new insights into the electronic structure and EET dynamics of the PSII core and PSI-C43' complexes. The key goals are to improve understanding of EET processes and the electronic properties of the cofactors in these two photosynthetic systems, and to broaden applicability of SHB. The rationale is that a better understanding of the structure-function relationship of these natural systems will further facilitate the development of artificial photovoltaic devices. One of the key objectives is to develop an algorithm to (simultaneously) model various types of optical spectra to improve our understanding of the functioning of photosynthetic complexes. Excitonic calculations will be performed using available crystal structures to correlate experimental results with known structures and to provide more insight into the structure-function relationship. In summary, a number of complementary methods and new approaches will be used to advance our understanding of photosynthesis. Professor Jankowiak will devote considerable attention to the involvement of students from under-represented groups and will develop a program for high school students to influence them early in life to pursue careers in science. A Chemistry Symposium will be organized once a year for high schools students and chemistry teachers from Kansas.

该奖项根据 2009 年美国复苏和再投资法案（公法 111-5）提供资金。在该奖项下，在化学系实验物理化学项目的支持下，堪萨斯州立大学的Ryszard Jankowiak教授将利用光谱烧孔（SHB）和单一光合复合光谱（SPCS）研究激子结构和激发能量转移（EET） ）在来自蓝细菌集胞藻的两个光合复合物中进行过程。预计来自 SBH 数据的信息将为 PSII 核心和 PSI-C43' 复合物的电子结构和 EET 动力学提供新的见解。主要目标是提高对 EET 过程和这两个光合作用系统中辅因子电子特性的理解，并扩大 SHB 的适用性。其基本原理是，更好地了解这些自然系统的结构-功能关系将进一步促进人造光伏器件的发展。关键目标之一是开发一种算法来（同时）模拟各种类型的光谱，以提高我们对光合复合体功能的理解。将使用可用的晶体结构进行激子计算，将实验结果与已知结构相关联，并提供对结构-功能关系的更多见解。总之，许多补充方法和新方法将用于增进我们对光合作用的理解。扬科维亚克教授将大力关注弱势群体学生的参与，并将为高中生制定一项计划，以影响他们在生命早期追求科学事业。每年将为堪萨斯州的高中生和化学教师组织一次化学研讨会。