Radiation Induced Reactions in Organized and Constrained Media

有组织和受限介质中的辐射诱发反应

• 批准号: 9509811
• 负责人: J. Kerry Thomas
• 金额: $ 9.5万
• 依托单位: University of Notre Dame
• 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: 1995-06-15 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9509811&HistoricalAwards=false
• 关键词: Radiation; Induced; Reactions; Organized; Constrained

This award is made in the Organic Dynamics Program is support of Dr. J. Kerry Thomas' continuing research on radiation-induced reactions in organized and constrained media. Reactive intermediates will be generated by photochemical or radiation excitation of pyrene or other adsorbed species trapped in zeolites, silica, or a host of polymers such as polystyrene, polyethylene, polymethyl methacrylate, polyacrylonitrile, polyvinyl chloride and polyvinyl alcohol. Depending on the system selected, electrons (e-), holes (h+), cations, cation-radicals, anions, and/or free radicals will be generated, and their reactivity, motion, and energy-transfer properties monitored by their fluorescence, phosphorescence, and absorption spectra. These techniques will reveal unique trapping sites for ions in solid media and will monitor migration of energy and charge in excited polymers, to soluble probe molecules. The behavior of reactive intermediates in constrained media is relevant to heterogeneous catalysis in the case of zeolites and silica, and to understanding the mechanism of light and radiation- induced degradation of polymers. The action of high-energy radiation on polymers relates to the use of polymers in microelectronics and the use of radiation processing in nanolithography.

该奖项是在有机动力学计划中颁布的，这是J. Kerry Thomas博士继续研究有组织和约束培养基中辐射诱导的反应的研究。 反应性中间体将通过焦油或其他被困在沸石，二氧化硅或多种聚合物（例如聚苯乙烯，聚乙烯，聚乙二醇，聚甲基甲基丙烯酸酯，聚丙烯硝基硝基硝基酯，聚乙烯基氯化物和聚乙烯基）等聚合物中的光化或辐射激发产生。 根据所选的系统，将产生电子（E-），孔（H+），阳离子，阳离子，阴离子和/或自由基，以及通过其荧光，磷光和吸收光谱的反应性，运动和能量转移特性。 这些技术将揭示固体培养基中离子的独特捕获位点，并将监测激发聚合物中能量和电荷的迁移，并向可溶性探针分子。 在受约束培养基中，反应性中间体在沸石和二氧化硅的情况下与异质催化有关，并了解光和辐射诱导的聚合物降解的机理。 高能辐射对聚合物的作用与聚合物在微电子中的使用以及在纳米光刻中使用辐射处理有关。