The Chemistry of Intramolecular Charge Transfer States of Polysilenes

聚硅烯分子内电荷转移态的化学

• 批准号: 9407036
• 负责人: Mark Steinmetz
• 金额: $ 18.75万
• 依托单位: Marquette University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407036&HistoricalAwards=false
• 关键词: Chemistry; Intramolecular; Charge; Transfer; States

9407036 Steinmetz Marquette University The photochemistry of aryl substituted di- and tri-silanes will be investigated. The hypothesis will be tested that the triplet local excited state (3LE) is populated by a 1LE - CT - 3LE sequence of electron transfer processes, which passes through a charge transfer state (CT). A p-cyanostilbenyl substituted disilane will be used to distinguish the singlet and triplet LE states by triplet quenching. These states will also be monitored by unique photo-products from a disilanyl substituted benzo 2.2.2 bicyclooctenone. CT photoreactivity will be monitored through kinetic studies involving reaction with alcohols. In addition, a study of wavelength effects on silylene extrusion versus electron transfer in trisilane systems will be pursued. The photoreactivity of exciplexes will also be probed by tethering the disilanyl electron transfer donor to electron deficient styrenes. This grant from the Organic Dynamics Program supports the work of Professor Mark G. Steinmetz at Marquette University. The photochemistry of compounds containing two and three silicon atoms bonded together will be studied. These compounds will also have a benzene-like substituent bonded to one of the silicon atoms. Ultraviolet light absorption by these compounds produces excited states from which photochemistry may proceed. These excited states and photo-products will be characterized. The results may provide insight to the design of photoresists that are important in the electronics industry.

9407036斯坦梅茨马奎特大学 本文将研究芳基取代的二硅烷和三硅烷的光化学。将测试三重态局部激发态（3LE）由电子转移过程的1 LE-CT- 3LE序列填充的假设，所述电子转移过程通过电荷转移态（CT）。对氰基芪取代的乙硅烷将用于通过三重态淬灭区分单线态和三重态LE状态。这些状态也将通过来自二硅烷基取代的苯并2.2.2双环辛烯酮的独特光产物来监测。将通过涉及与醇反应的动力学研究监测CT光反应性。此外，研究波长对硅烯挤出与电子转移在丙硅烷系统的影响。激基复合物的光反应性也将通过将二硅烷基电子转移供体拴系到缺电子苯乙烯来探测。 有机动力学项目的这项资助支持了马克·G.斯坦梅茨在马奎特大学。将研究含有两个和三个硅原子键合在一起的化合物的光化学。这些化合物还将具有键合到硅原子之一上的类苯取代基。这些化合物吸收紫外光产生激发态，光化学可以从激发态进行。这些激发态和光产物将被表征。这些结果可以为电子工业中重要的光致抗蚀剂的设计提供见解。