Visible-light NO photolysis of ruthenium nitrosyl complexes with N<sub>2</sub>O<sub>2</sub> ligands bearing π-extended rings and their photorelease dynamics
作者:Minyoung Kim、Seongchul Park、Dayoon Song、Dohyun Moon、Youngmin You、Manho Lim、Hong-In Lee
DOI:10.1039/d2dt01019d
日期:——
the complexes before and after the photolysis confirmed the conversion of diamagnetic Ru(II)(L)(Cl)–NO+ to paramagnetic S = ½ Ru(III)(L)(Cl)–solvent by photons (L = salophen2− and naphophen2−). The photoreleased NO radicals were detected by spin-trapping EPR. DFT and TDDFT calculations found that the photoactive bands are configured as mostly the ligand-to-ligand charge transfer (LLCT) of π(L) → π*(Ru–NO)
两种 RuNO} 6配合物,Ru(salophen)(NO)Cl ( 1 ) 和 Ru(naphophen)(NO)Cl ( 2 ) 的 NO 光释放及其动力学,带有带有 π 扩展系统的salen 型配体 (salophenH 2研究了= N , N '-(1,2-亚苯基)-双(水杨基亚胺) 和萘酚H 2 = N , N '-1,2-亚苯基-双(2-羟基-1-萘亚甲基亚胺))。在白色室内光下不进行光解,并通过 UV/Vis、EPR 和 NMR 光谱进行监测。对于1和2,在 459 和 489 nm 照射下也进行了 NO 光解, 分别。在辐照波长下, 1和2的 NO 光解 ( Φ NO )的光化学量子产率被确定为 9%。光解前后配合物的结构和光谱特征证实了反磁性 Ru( II )(L)(Cl)–NO +通过光子转化为顺磁性S = ½ Ru( III )(L)(Cl)– 溶剂(L =萨洛芬2−和萘芬2−)。通过自旋捕获