<i>trans-</i>(Cl)-[Ru(5,5′-diamide-2,2′-bipyridine)(CO)<sub>2</sub>Cl<sub>2</sub>]: Synthesis, Structure, and Photocatalytic CO<sub>2</sub>Reduction Activity
作者:Yusuke Kuramochi、Kyohei Fukaya、Makoto Yoshida、Hitoshi Ishida
DOI:10.1002/chem.201500782
日期:2015.7.6
trans‐(Cl)‐[Ru(L)(CO)2Cl2]‐type complexes, in which the ligands L are 2,2′‐bipyridyl derivatives with amide groups at the 5,5′‐positions, are synthesized. The C‐connected amide group bound to the bipyridyl ligand through the carbonyl carbon atom is twisted with respect to the bipyridyl plane, whereas the N‐connected amide group is in the plane. DFT calculations reveal that the twisted structure of the
一系列反式(Cl)-[Ru(L)(CO)2 Cl 2 ]-型配合物,其中配体L是2,5'-位置带有酰胺基的2,2'-联吡啶基衍生物,是合成的。通过羰基碳原子与联吡啶配体结合的C连接酰胺基相对于联吡啶平面是扭曲的,而N连接酰胺基在该平面中。DFT计算表明,C连接的酰胺基团的扭曲结构提高了LUMO的水平,这导致了钌配合物的第一还原电位(E p)负移。在光反应中评估了CO 2还原的催化能力(λ> 400 nm)和钌配合物(催化剂),[Ru(bpy)3 ] 2+(bpy = 2,2'-联吡啶;光敏剂)和1-苄基-1,4-二氢代烟酰胺(电子给体)在CO 2饱和的N,N-二甲基乙酰胺/水中。转换频率的对数通过将E p偏移负值来增加,直到达到光敏剂的还原电位为止。