| 초록 |
Herein, we report two new trans(Cl)-[Ru(6-X-bpy)(CO)2Cl2] complexes functionalized with saturated ethylene-linked functional group (bpy = 2,2′-bipyridine; X = –(CH2)2–OH or –(CH2)2–N(CH3)2) at the ortho(6)-position of bpy ligand, which are named Ru-bpyOH and Ru-bpydiMeN, respectively. In the series of photolysis experiments, the asymmetric attachment of tethering ligand to the bpy ligand led to less efficient but more selective formate production with inactivation of CO2-to-CO conversion route during photoreaction. From a series of in situ FTIR analyses, it was found that the Ru-formate intermediates are stabilized by a hydrogen bonding between pendent proton donors (–diMeN+H or –OH) and the oxygen atom of metal-bound formate (RuI‒OCHO‧‧‧H‒E‒(CH2)2‒, E = O or diMeN+). |
