Partitioning of Light Energy Absorbed by Organic Chemicals

有机化学品吸收光能的分配

• 批准号: 9811570
• 负责人: Peter Wagner
• 金额: $ 45.2万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-15 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811570&HistoricalAwards=false
• 关键词: Partitioning; Light; Energy; Absorbed; Organic

This research focuses on two general themes; the effect of molecular structure on localizing photonic excitation energy, and the selectivity of the resulting reactivity. The temperature dependence of the quantum efficiency of intramolecular hydrogen abstraction will be measured for a series of structurally related ketones to distinguish processes controlled by changes in energy from those controlled by variations in surface crossing probabilities. The temperature dependence of the ratio of photoinduced cyclization in biradical arising from intramolecular hydrogen abstraction, relative to other competing processes, will be correlated with theoretical computations of biradical structure to elucidate the role of structure on intersystem crossing. Graduate and postdoctoral students will be trained in organic synthesis and mechanistic organic photochemistry. With this award, the Organic and Macromolecular Chemistry Program supports the research of Dr. Peter Wagner of the Department of Chemistry at Michigan State University. The absorption of light causes an abrupt increase in a molecule's energy thereby enhancing its reactivity. Dr. Wagner will focus his research on elucidating the processes by which the excited molecule localizes the energy needed to achieve a specific reaction, and identifying the structural parameters that affect this energy localization. Dr. Wagner's educational activities involve training graduate and postdoctoral students in organic synthesis, and the measurement and characterization of excited-state processes.

这项研究主要集中在两个主题上： 结构对光子激发能的局域化，以及选择性 的反应性。 量子的温度依赖性 将测量分子内氢提取的效率， 一系列结构相关的酮，以区分过程 由能量变化控制的， 表面交叉概率 该比率的温度依赖性 分子内双自由基的光诱导环化 氢提取，相对于其他竞争过程，将是 与双自由基结构的理论计算相关， 阐明结构在系统间杂交中的作用。 研究生和 博士后学生将接受有机合成的培训， 机械有机光化学 有了这个奖项，有机和高分子化学计划 支持化学系的Peter瓦格纳博士的研究 在密歇根州立大学。 光的吸收引起了 增加分子的能量从而提高其反应性。 博士 瓦格纳的研究重点将是阐明 受激分子将实现特定的 反应，并确定影响此的结构参数 能量定位 瓦格纳博士的教育活动包括 培养有机合成的研究生和博士后， 激发态过程的测量和表征。