Effects of Sequence, Connectivity, and Counter Ions in New Amide-Linked Ru(tpy)<sub>2</sub>–Re(bpy) Chromophores on Redox Chemistry and Photophysics
作者:Jan Dietrich、Ute Thorenz、Christoph Förster、Katja Heinze
DOI:10.1021/ic301632y
日期:2013.2.4
ligands L1–L3 based on bis(terpyridine) ruthenium(II) complexes decorated with differently substituted 2,2′-bipyridines attached via amide groups (5-NHCO-bpy, 4-CONH-bpy, 5-CONH-bpy) were prepared. Coordination of ReICl(CO)3 fragments to the bpy unit gives the corresponding bimetallic Ru∼Re complexes 1–3. Hydrogen bonds of the bridging amide groups to [PF6]− counterions or to water molecules are observed
基于双(叔吡啶)钌(II)配合物的新型阳离子金属配体L1 - L3,装饰有通过酰胺基团连接的不同取代的2,2'-联吡啶(5-NHCO-bpy,4-CONH-bpy,5-CONH-bpy )已准备好。再协调我氯(CO)3个片段与联吡啶单元得到相应的双金属配合物Ru~Re 1 - 3。桥接酰胺基团的氢键与[PF 6 ] -在固态和溶液中均观察到抗衡离子或对水分子的离子。探讨了酰胺取向,连接位点以及抗衡离子配位对氧化还原和光物理性质的影响。金属配体L1 – L3和双金属配合物1 – 3在室温下均在流体溶液中发射。在所有情况下,发射都来自3个MLCT(Ru)状态。因此,L1 – L3和1 – 3第一次氧化为[L1] + – [L3] +和[1] + –[3] +被指定为Ru II / III对,而[L1] – – [L3] –和[1] – – [3] –的第一个还原发生在tpy-CO配体上,如UV