...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of photochemistry and photobiology, C. Photochemistry reviews >Extracting fundamental photochemical and photophysical information from photorearrangements of aryl phenylacylates and aryl benzyl ethers in media comprised of polyolefinic films
【24h】

Extracting fundamental photochemical and photophysical information from photorearrangements of aryl phenylacylates and aryl benzyl ethers in media comprised of polyolefinic films

机译：在由聚烯烃薄膜组成的介质中，从芳基苯基酰化物和芳基苄基醚的光重排中提取基本的光化学和光物理信息

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A review is presented of the use of photo-Fries rearrangements of aryl esters and photo-Claisen rearrangements of aryl ethers to probe the microenvironments of polyolefinic media and of the use of polyolefinic media to increase the selectivity of the photoreactions. Related photophysical data and results from photoreactions of the same probe molecules in 'model' isotropic media are employed in the analyses. For the most part, the focus is on studies performed by the authors. Factors associated with the directing influences of the 'reaction cages' of the polymers on singlet radical pair intermediates in these reactions are discussed. They include (1) small differences between the trajectory of approach of phenylacyl and benzylic radicals when bonding to their aryloxy radical partners in a cage and (2) the intrinsic reactivity of the aryloxy radicals. It is shown that the interplay between the polymeric hosts and their guests is complex, involving structural and dynamic factors that can be "tuned" to lead to very selective photochemical transformations. Information about both the mechanisms of transformations of the guests and the micromorphology of the polymer hosts is revealed and dissected.
机译：综述了使用芳基酯的光-弗里斯重排和芳基醚的光-克莱森重排来探测聚烯烃介质的微环境，以及使用聚烯烃介质来增加光反应的选择性。分析中使用了相关的光物理数据和“模型”各向同性介质中相同探针分子的光反应结果。在大多数情况下，重点是作者进行的研究。讨论了与这些反应中聚合物的“反应笼”对单线态自由基对中间体的直接影响有关的因素。它们包括（1）苯甲酰基和苄基在与笼中的芳氧基自由基配偶结合时接近的轨迹之间的微小差异，以及（2）芳氧基自由基的固有反应性。结果表明，聚合物主体与其客体之间的相互作用是复杂的，涉及结构和动力学因素，这些因素可以“调节”以导致非常选择性的光化学转化。揭示并剖析了有关客体转化机理和聚合物主体微观形态的信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号