Byrd Jessica, Bruno John G, Richter Mark M
Department of Chemistry, Missouri State University, Springfield, MO 65897, USA.
Luminescence. 2006 Mar-Apr;21(2):72-6. doi: 10.1002/bio.886.
The spectroscopic and electrochemiluminescence (ECL) properties of dipicolinic acid (DPA), (bpy)(2)Ru(2+) (bpy = 2,2'-bipyridine) and the species formed when DPA and (bpy)(2)Ru(2+) [abbreviated to (bpy)(2)Ru(DPA)(+)] are allowed to react are reported. The UV-Vis absorption maxima for (bpy)(2)Ru(2+) and (bpy)(2)Ru(DPA)(+) are 493 and 475 nm, respectively, indicating the in situ formation of a complex between DPA and (bpy)(2)Ru(2+). DPA, (bpy)(2)Ru(2+) and (bpy)(2)Ru(DPA)(+) display ECL upon oxidation in the presence of the oxidative-reductive co-reactant tri-n-propylamine (TPrA). The ECL of (bpy)(2)Ru(DPA)(+) is at least two-fold higher than either of the parent species. An ECL spectrum of (bpy)(2)Ru(DPA)(+) displays a peak maximum 40 nm red-shifted from the photoluminescence peak maximum, suggesting that the excited state formed electrochemically is different from that formed spectroscopically.
报道了吡啶二甲酸（DPA）、（联吡啶）钌（II）[（bpy）₂Ru²⁺，bpy = 2,2'-联吡啶]以及DPA与（bpy）₂Ru²⁺反应形成的物质[简称为（bpy）₂Ru（DPA）⁺]的光谱和电化学发光（ECL）性质。（bpy）₂Ru²⁺和（bpy）₂Ru（DPA）⁺的紫外-可见吸收最大值分别为493和475 nm，表明DPA与（bpy）₂Ru²⁺原位形成了配合物。在氧化还原共反应物三正丙胺（TPrA）存在下氧化时，DPA、（bpy）₂Ru²⁺和（bpy）₂Ru（DPA）⁺均显示出ECL。（bpy）₂Ru（DPA）⁺的ECL比任何一种母体物质至少高两倍。（bpy）₂Ru（DPA）⁺的ECL光谱显示其峰值最大值比光致发光峰值最大值红移了40 nm，这表明电化学形成的激发态与光谱学形成的激发态不同。
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