Spectroscopic and redox properties of amine-functionalized K2[OsII(bpy)(CN)4] complexes
作者:Michael J. Ahrens、Paul A. Bertin、Adam G. Gaustad、Dimitra Georganopoulou、Markus Wunder、Gary F. Blackburn、Harry B. Gray、Thomas J. Meade
DOI:10.1039/c0dt01478h
日期:——
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。