We report the first examples of amine-functionalized K2[OsII(bpy)(CN)4] (bpy = 2,2′-bipyridine) complexes. The tetracyanoosmate complexes were prepared by UV irradiation (λ = 254 nm) of K4[OsII(CN)6] and primary amine-functionalized bpy ligands in acidic aqueous media. The aqueous solution pH dependences of the spectroscopic and redox properties of 4,4′- and 5,5′-substituted complexes have been investigated. The pendant amine functional groups and coordinated cyanide ligands are basic sites that can be sequentially protonated, thereby allowing systematic tuning of electrochemical and optical spectroscopic properties.
我们首次报道了胺官能化 K2[OsII(bpy)(CN)4](bpy = 2,2′-联
吡啶)配合物的实例。K4[OsII(CN)6] 和
伯胺官能化 bpy
配体在酸性
水介质中通过紫外线照射(λ = 254 纳米)制备了四
氰基
锇酸盐配合物。研究了 4,4′- 和 5,5′- 取代配合物的光谱和氧化还原特性的
水溶液 pH 依赖性。悬挂的胺官能团和配位的
氰配体是碱性位点,可以依次质子化,从而系统地调整电
化学和光学光谱特性。