Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA.
Molecules. 2020 Aug 26;25(17):3892. doi: 10.3390/molecules25173892.
The excitation of lanthanides with visible light to promote photochemical reactions has garnered interest in recent years. Lanthanides serve as initiators for photochemical reactions because they exhibit visible-light-promoted 4f→5d transitions that lead to emissive states with electrochemical potentials that are more negative than the corresponding ground states. The lanthanides that have shown the most promising characteristics for visible-light promoted photoredox are Sm, Eu, and Ce. By understanding the effects that ligands have on the 5d orbitals of Sm, Eu, and Ce, luminescence and reactivity can be rationally modulated using coordination chemistry. This review briefly overviews the photochemical reactivity of Sm, Eu, and Ce with visible light; the properties that influence the reactivity of these ions; and the research that has been reported towards modulating their photochemical-relevant properties using visible light and coordination chemistry.
近年来，激发镧系元素以可见光促进光化学反应引起了人们的兴趣。镧系元素可用作光化学反应的引发剂，因为它们表现出可见光促进的 4f→5d 跃迁，导致具有电化学势比相应基态更负的发射态。在可见光促进的光氧化还原中表现出最有前途特性的镧系元素是 Sm、Eu 和 Ce。通过了解配体对 Sm、Eu 和 Ce 的 5d 轨道的影响，可以使用配位化学合理调节发光和反应性。本文简要综述了 Sm、Eu 和 Ce 与可见光的光化学反应性；影响这些离子反应性的性质；以及使用可见光和配位化学来调节它们的光化学相关性质的研究报告。
