Photocatalytic CO<sub>2</sub> Reduction with Manganese Complexes Bearing a κ<sup>2</sup>-PN Ligand: Breaking the α-Diimine Hold on Group 7 Catalysts and Switching Selectivity
作者:Yasmeen Hameed、Bulat Gabidullin、Darrin Richeson
DOI:10.1021/acs.inorgchem.8b02719
日期:2018.11.5
on Mn and Re supported by κ2-PN phosphinoaminopyridine ligands were identified. These catalysts, [Mκ2-(Ph2P)NH(NC5H4)}(CO)3Br], displayed excellent product selectivity and, by a change of only the metal center, gave a dramatic product switch from CO with M = Mn to HCO2H with M = Re. The catalyst systems were explored with variation of the ligand, electron donor, solvent, and photosensitizer. The products
将CO 2还原成更有价值的含能化合物的根本挑战取决于揭示用于该过程的新催化剂。通过除去α-二亚胺连接的长期限制,这是在光催化复合物占优势在这方面的,新的可见光,CO 2基于Mn和重-还原光催化剂支持κ 2个-PN phosphinoaminopyridine配体进行鉴定。这些催化剂,[M κ 2 - (PH 2 P)NH(NC 5 H ^ 4)} ...(CO)3 BR],显示优良的产物选择性,并且仅由金属中心的变化,给从戏剧性产物开关M = Mn到HCO 2的COH,M = Re。探索了配体,电子给体,溶剂和光敏剂的变化对催化剂体系的影响。使用13 CO 2作为底物明确追踪产物。两种配合物均猝灭了激发态光敏剂Ru(bpy)3 2+ *,表明氧化猝灭是进入催化循环的一种潜在途径。