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Properties of Amine-Containing Ligands That Are Necessary for Visible-Light-Promoted Catalysis with Divalent Europium
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-11-23 , DOI: 10.1021/acs.inorgchem.2c02911 Ramiro Barraza 1 , Alexander G Sertage 1 , Aravind B Kajjam 1 , Cassandra L Ward 2 , Jacob C Lutter 3 , H Bernhard Schlegel 1 , Matthew J Allen 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-11-23 , DOI: 10.1021/acs.inorgchem.2c02911 Ramiro Barraza 1 , Alexander G Sertage 1 , Aravind B Kajjam 1 , Cassandra L Ward 2 , Jacob C Lutter 3 , H Bernhard Schlegel 1 , Matthew J Allen 1
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We describe a study of the influence of amine-containing ligands on the photoredox-relevant properties of EuII toward the rational design of EuII-containing catalysts for visible-light-promoted photoredox reactions. We report our observations of the effects of the degree of functionalization of amines, denticity, and macrocylic ligands on the absorbance of EuII. Ligands that contain secondary amines bathochromically shift the absorbance of EuCl2 relative to ligands that contain primary or tertiary amines. Similarly, ligands of larger denticity have a larger bathochromic shift of the absorbance than ligands of smaller denticity. We observed that macrocyclic ligands have a larger effect on the absorbance of EuCl2 than nonmacrocyclic ligands. Also, we report the photoredox reactivity of four new EuII-containing complexes. These observations are potentially influential in understanding the ligand properties that promote the use of EuII in visible-light-promoted photoredox catalysis.
中文翻译：
二价铕可见光催化催化所需的含胺配体的性质
我们描述了含胺配体对 Eu II光氧化还原相关特性的影响的研究，以合理设计用于可见光促进光氧化还原反应的含 Eu II催化剂。我们报告了胺的官能化程度、齿数和大环配体对 Eu II吸光度影响的观察结果。相对于含有伯胺或叔胺的配体，含有仲胺的配体使EuCl 2的吸光度发生红移。类似地，较大齿数的配体比较小齿数的配体具有更大的吸光度红移。我们观察到大环配体对EuCl 2吸光度的影响比非大环配体更大。此外，我们报告了四种新的含 Eu II配合物的光氧化还原反应活性。这些观察结果对于理解配体特性具有潜在影响，这些配体特性促进了 Eu II在可见光促进的光氧化还原催化中的应用。
更新日期：2022-11-23
中文翻译：
二价铕可见光催化催化所需的含胺配体的性质
我们描述了含胺配体对 Eu II光氧化还原相关特性的影响的研究，以合理设计用于可见光促进光氧化还原反应的含 Eu II催化剂。我们报告了胺的官能化程度、齿数和大环配体对 Eu II吸光度影响的观察结果。相对于含有伯胺或叔胺的配体，含有仲胺的配体使EuCl 2的吸光度发生红移。类似地，较大齿数的配体比较小齿数的配体具有更大的吸光度红移。我们观察到大环配体对EuCl 2吸光度的影响比非大环配体更大。此外，我们报告了四种新的含 Eu II配合物的光氧化还原反应活性。这些观察结果对于理解配体特性具有潜在影响，这些配体特性促进了 Eu II在可见光促进的光氧化还原催化中的应用。
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