In this study, the photosensitive nature of reactive enamine and polyenamine intermediates is investigated to improve our understanding of light-mediated aminocatalytic reactions. Experimental optical absorption data and TD-DFT calculations reveal that these intermediates are excited directly from the HOMO on the enamine moiety to low-lying unoccupied orbitals localized on the catalyst scaffold. This indicates that the photophysical properties of enamine intermediates can be tuned for visible light-mediated reactions by modifications to the aminocatalyst.

中文翻译：

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光驱动氨基催化中烯胺中间体的可调光物理性质

在这项研究中，研究了反应性烯胺和多烯胺中间体的光敏性质，以提高我们对光介导的氨基催化反应的理解。实验光吸收数据和 TD-DFT 计算表明，这些中间体直接从烯胺部分上的 HOMO 激发到位于催化剂支架上的低位未占轨道。这表明可以通过对氨基催化剂的修饰来调整烯胺中间体的光物理性质以适应可见光介导的反应。