A novel polypyridyl ruthenium(II) complex with a six-membered chelate ring ([Ru(dmb)₂(8pyq)]²⁺) was designed and synthesized. The oxidation potential was shifted to the negative potential direction, and relatively intense metal-to-ligand charge transfer absorption in the longer-wavelength region was observed for [Ru(dmb)₂(8pyq)]²⁺ compared with the reference complexes without any six-membered chelate rings. The electrochemical and spectroscopic properties of [Ru(dmb)₂(8pyq)]²⁺ were discussed in terms of the chelate structure and coordination geometry with utilization of theoretical calculations.

中文翻译：

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具有六元螯合物结构的新型钌（II）配合物的电化学和光谱行为

设计并合成了具有六元螯合环（[Ru （dmb）₂（8pyq）] ²⁺）的新型聚吡啶钌（II）配合物。氧化电位向负电位方向移动，与没有任何参比配合物的参比配合物相比，[Ru （dmb）₂（8pyq）] ²⁺在较长波长区域内观察到了相对强烈的金属-配体电荷转移吸收六元螯合环。[Ru（dmb ）₂（8pyq）] ²⁺的电化学和光谱性质利用理论计算方法从螯合物的结构和配位几何学方面进行了讨论。