基于自由基6π光循环反应的光路易斯酸生成器
Ryo Mizutsu1, Ryosuke Asato1,2, Colin J Martin1,2
1Division of Materials Science , Nara Institute of Science and Technology (NAIST) , Ikoma , Nara 630-0192 , Japan.
Journal of the American Chemical Society
|December 10, 2019
概括
一个新的光活性分子在照明时产生易斯酸,以高效率启动聚合并催化反应. 这种光路易斯酸生成器 (PLAG) 提供了一个新的光门化学系统.
科学领域:
- 有机化学
- 摄影化学
- 聚合物科学
背景情况:
- 易斯酸是有机合成中的重要催化剂.
- 光酸发生器提供空间和时间控制化学反应.
- 现有的光酸发电机通常在效率和反应性方面存在局限性.
研究的目的:
- 开发一种能够产生易斯酸的新型光活性分子.
- 调查光生成的易斯酸的催化应用.
- 评估这种新型光酸生成系统的效率和性能.
主要方法:
- 一种作为光路易斯酸发生器 (PLAG) 的新型光活性分子的合成.
- 由光照引发的光化学6π-循环.
- 在环氧单体聚合和Mukaiyama-aldol反应中产生碳酸的应用.
主要成果:
- 在光照下,PLAG分子成功生成了凝聚的芳香碳酸.
- 碳酸有效启动了环氧单体聚合,改变了聚合物的终端结构.
- 在Mukaiyama- aldol反应中观察到高的催化活性和转换数量 (> 60).
- 实现了50%的高光化学量子产量.
结论:
- 一种基于光化学6π循环的新型光路易斯酸发生器 (PLAG) 成功开发.
- 产生的易斯酸在聚合和阿尔多尔反应中表现出强大的催化活性.
- 该系统是一个高效的光门化学工具,与传统的光酸发生器相比,具有显著的优势.
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