New Aspects on Photoisomerization. Mechanistic Concepts, Medium Effects and Photosensitive Bioipigments and Materials

光异构化的新方面。

• 批准号: 0514737
• 负责人: Robert S. Liu
• 金额: $ 33.6万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0514737&HistoricalAwards=false
• 关键词: New; Aspects; Photoisomerization.; Mechanistic; Concepts

With this award, the Organic and Macromolecular Chemistry Program continues its support of the work of Professor Robert Liu of the Department of Chemistry at the University of Hawaii. The research will extend the PI's investigations of the fundamental aspects of alkene photoisomerization in confined media. The focus of the project is the Hula-Twist (HT) mechanism for photochemical conversion of cis to trans alkenes, which was discovered by the PI and is now thought to be important in many photobiological processes. A series of experiments designed to explore the effect of substitution and spin multiplicity on the H-T photoisomerization will be undertaken. The regeoselectivity and the isotope effects on this reaction will also be examined. In a series of experiments that are relevant to photobiology and photoprocesses in material science, the role of HT isomerizations in retinals, cyanine dyes, and pyrrole based alkenes will be investigated. These investigations of alkene photoisomerization, which will provide fundamental new information on photochemical reactivity, will have significant impact on areas ranging from the chemistry of vision to materials science. The project provides an excellent way of introducing undergraduate students to a sophisticated research program.

有了这个奖项，有机和大分子化学项目继续支持夏威夷大学化学系罗伯特·刘教授的工作。这项研究将扩展PI在密闭介质中烯烃光异构化基本方面的研究。该项目的重点是顺式到反式烯烃光化学转化的Hula-Twist （HT）机制，该机制是由PI发现的，现在被认为在许多光生物过程中很重要。一系列的实验旨在探索取代和自旋多重性对H-T光异构化的影响。还将研究该反应的地质选择性和同位素效应。在一系列与材料科学中的光生物学和光过程相关的实验中，将研究HT异构化在视网膜，花青素染料和吡咯基烯烃中的作用。烯烃光异构化的这些研究将为光化学反应性提供新的基础信息，并将对从视觉化学到材料科学等领域产生重大影响。该项目提供了一个极好的方式介绍本科生复杂的研究计划。