Accumulative Charge Separation in a Modular Quaterpyridine Bridging Ligand Platform and Multielectron Transfer Photocatalysis of π-Linked Dinuclear Ir(III)–Re(I) Complex for CO<sub>2</sub> Reduction
作者:Daehan Lee、Min Su Choe、Hyung Joo Lee、Jae Yoon Shin、Chul Hoon Kim、Ho-Jin Son、Sang Ook Kang
DOI:10.1021/acs.inorgchem.3c00496
日期:2023.6.5
bridging ligand (BL), in which the two planar Ir/Re metalated bipyridine (bpy) ligands were connected but slightly canted relative to each other, linking the heteroleptic Ir(III) photosensitizer, [(piqC^N)2IrIII(bpy)]+, and catalytic Re(I) complex, (bpy)ReI(CO)3Cl, minimized the energy lowering of the qpy BL, which hampers the forward photoinduced electron transfer (PET) process from [(piqC^N)2IrIII(N^N)]+
四种空间扭曲的四联吡啶 ( qpy ) 配体-桥接 Ir(III)–Re(I) 异金属配合物(Ir-qpy mm -Re、Ir-qpy mp -Re、Ir-qpy pm -Re和Ir-qpy pp -Re ), 其中两个 2,2'-联吡啶配体的偶联吡啶单元的位置是变化的 (meta ( m )- 或 para ( p )- 位置), pypy x –py x py ( x = m和m , qpy mm ; x =m和p , qpy mp ; x = p和m , qpy pm ; x = p和p , qpy pp ), 连同完全 π-共轭的 Ir(III)-[π linker]-Re(I) 复合物 (π linker = 2,2'-bipyrimidine ( bpm ), Ir -bpm-Re ; π linker = 2,5-di(pyridin-2-yl)pyrazine ( dpp )