Acquisition of Fluorescence Lifetime and Transient Fluores- cense Equipment

荧光寿命和瞬态荧光设备的购置

• 批准号: 8908046
• 负责人: John Torkelson
• 金额: $ 6.5万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-01 至 1990-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8908046&HistoricalAwards=false
• 关键词: Acquisition; Fluorescence; Lifetime; Transient; Fluores

This research equipment grant is for the purchase of fluorescence lifetime and transient fluorescence equipment to be used primarily by the two co-PIs Torkelson and Lewis as well as other researchers at Northwestern. Torkelson's research is the application of fluorescence and phosphorescence techniques in the study of basic issues elated to polymer science and engineering: diffusion-limited interaction in polymer solutions, phase separation in polymer blends and in block copolymer systems in solution and the bulk state, the distribution of local free volume and its sensitivity to physical aging in polymer glasses, and polymer-polymer interpenetration, interdiffusion, and correlations in homopolymer and block copolymer systems. The focus of Lewis' research is the investigation of reactions which occur via electronically executed complexes which are used to establish the role of exciplexes and radical ion pairs in reactions of fundamental importance to organic photochemistry such as cycloaddition and proton transfer. Near term uses planned for the instrumentation include: the study of diffusion-limited interactions in polymer solutions which may lead to a better understanding of the gel effect in free radical polymerization; investigation of phase separation phenomena and compatibilization in block copolymers solutions, blend with homopolymers, and in the bulk state; intermolecular correlations in homopolymers, block copolymers and polymer blends; obtaining local free volume distribution in amorphous polymer systems; determination of the mode of diffusion in polymer welding phenomena (interdiffusion across a polymer-polymer interface); characterization of the basic photophysics of polymer systems; excimer and exciplex kinetics studies; and investigations of excited state of Lewis acid complexes.

这项研究设备补助金用于购买 荧光寿命和瞬态荧光设备， 主要由两个共同PI Torkelson和刘易斯使用， 以及西北大学的其他研究人员。 Torkelson的研究是荧光的应用， 磷光技术中有关基本问题的研究 到聚合物科学和工程：扩散限制 聚合物溶液中的相互作用，聚合物中的相分离 共混物和嵌段共聚物体系中的溶液和本体 状态、局部自由体积分布及其 聚合物玻璃对物理老化的敏感性，以及 聚合物-聚合物互穿、互扩散和 均聚物和嵌段共聚物体系中的相关性。 的 刘易斯研究的重点是研究反应 其通过电子执行的复合物发生， 用于确定激基复合物和自由基离子对的作用 在对有机物的重要反应中， 光化学，如环加成和质子转移。 计划用于该仪器的近期用途包括： 高分子溶液中扩散限制相互作用研究 这可能会导致更好地理解凝胶效应， 自由基聚合;相分离研究 嵌段共聚物溶液中的现象和增容作用， 与均聚物共混，并处于本体状态;分子间 均聚物、嵌段共聚物和聚合物中的相关性 共混物;获得非晶中的局部自由体积分布 聚合物体系.扩散方式的测定 聚合物焊接现象（通过 聚合物-聚合物界面）;表征的基本 聚合物体系的电子物理学.激基缔合物和激基复合物动力学 刘易斯酸激发态的研究 配合物