uptake and luminescence microscopy imaging studies were conducted. Complex 1Cl readily entered the cancer cell lines HeLa and U2OS with mitochondrial staining seen and intense emission allowing for imaging at concentrations as low as 1 μM. Long-term toxicity results indicate low toxicity in HeLa cells with LD50 >100 μM. Osmium(II) complexes based on 1 therefore present an excellent platform for the development
复合物 [Os(btzpy)2][PF6]2 (1, btzpy = 2,6-bis(1-phenyl-1,2,3-triazol-4-yl)pyridine) 已被制备和表征。复合物 1 表现出
磷光(λem = 595 nm,τ = 937 ns,在脱气
乙腈中 φem = 9.3%)与其已知的
钌 (II) 类似物形成对比,后者在室温下不发射。该配合物经历了显着的氧依赖性发射猝灭,脱气和充气
乙腈溶液之间的发光强度降低了 43 倍,表明其具有作为单线态氧敏化剂的潜力。配合物 1 进行反离子复分解产生 [Os(btzpy)2]Cl2 (1Cl),其显示出与 1 几乎相同的光学吸收和发射光谱。直接测量了被 1Cl 敏化的单线态氧的产率(φ( 1O2) = 57%) 对于空气平衡的
乙腈溶液。在这些光物理特性的基础上,进行了初步的细胞摄取和发光显微成像研究。复合物 1Cl 很容易进入癌
细胞系 HeLa