Organic Photochemistry Induced by Visible and Infrared Irradiation and in Unusual Environments

可见光和红外辐射以及异常环境中诱导的有机光化学

• 批准号: 9528265
• 负责人: John White
• 金额: $ 51.03万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-12-01 至 1999-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528265&HistoricalAwards=false
• 关键词: Organic; Photochemistry; Induced; Visible; Infrared

This renewal award is made in the Organic Dynamics Program in support of the research of Dr. Marye Anne Fox. The structure, chemical properties, photoreactivity, and new routes for the generation of stable radicals, biradicals, radical ions and carbenes will be investigated. Structure will be established by a comparison of solution phase and solid state NMR spectroscopy, by electrochemical techniques, and by transient and steady state photochemical probes for excited state reactivity. The effect of structure on the efficiency of photoinduced electron transfer and whether novel photoreactivity can be initiated by long wavelength visible or infared light will be explored. The effect of phase and local environment on selective partitioning among competing reaction pathways from a common excited state will be studied. This work will focus on understanding differences in typical photochemical behavior elicited by constraining a photoactive molecule within a size-constrained zeolite, within a self-assembled monolayer, within molecular solids, and in supercritical fluids. Progress in understanding the key reactions organic chemistry depends on the knowledge of the properties, stabilities and structures of reactive intermediates. Such knowledge is required for understanding the efficient utilization of light-adsorptive organic dyes in mechanistic chemistry, for the design of molecular conductors, semiconductors, and magnets, in the synthesis of surface-modified catalysts, and as a vehicle for understanding aggregation effects in controlling chemical reactivity. f8 Û-ª þ ; + S u m m a r y I n f o r m a t i o n ( ++++++++++++ ( Û ++++++++++++ ++++++++++++ ++++++++++++ + Ûª▓ ÑOh ª' +'ª▒0 Ý + ] $ H l + ¢ ╗ D h + ++++++++++++++++++++++++++++++++ R:\WWUSER\TEMPLATE\NORMAL.DOT

该更新奖是在有机动力学计划中颁发的，以支持玛丽·安妮·福克斯博士的研究。将研究结构，化学性质，光电反应性和新途径，用于生成稳定的自由基，Biradicals，自由基离子和碳纤维。结构将通过溶液相和固态NMR光谱，电化学技术以及激发状态反应性的短暂和稳态光化学问题进行比较。结构对光诱导的电子转移效率的影响以及是否可以通过长波长可见或降低光线来启动新颖的光电反应性。相位和局部环境对来自共同激发状态的竞争反应途径之间选择性分配的影响将是研究的。这项工作将集中在理解典型的光化学行为中的差异，从而在大小约束的沸石中限制光活性分子，在自组装单层内，分子固体内和超临界笛子中。理解关键反应有机化学的进展取决于反应性中间体的性质，系统和结构的知识。需要这种知识才能理解机械化学中光吸附有机染料的有效利用，用于设计分子导体，半导体和磁铁，合成表面改性的催化剂，以及作为理解控制化学反应性骨料效应的工具。 f8和ª; +S U M M A R Y I N F O R M A T I O N（++++++++++++++++（++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++s ++++++++++++++++++++++++++++++++++++++ r：\ wwuser \ template \ normal.dot