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Highly Efficient Electrochemiluminescence of Functionalized Tris(2,2′-bipyridyI)ruthenium(Ⅱ) and Selective Concentration Enrichment of Its Co-reactants

机译:功能化三(2,2'-联吡啶I)钌(Ⅱ)的高效电化学发光及其共反应物的选择性富集

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摘要

An enhanced electrochemiluminescence (ECL) efficiency is obtained from the ruthenium complex tris(2,2′-bipyridyl)ruthe-nium(Ⅱ) (Ru(bpy)_(3~(2+))) by introduction of an ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate (BMImBF_4). Upon addition of 1 % (v/v) BMImBF_4 to 0.1 him Ru(bpy)_(3~(2+) solution, a maximum increase in ECL intensity is obtained both at an indium tin oxide (ITO) electrode (15-fold) and at a glassy carbon (GC) electrode (5- to 6-fold). Furthermore, upon addition of 1 % (v/v) BMImBF_4 to 5 μm Ru(bpy)_(3~(2+))/100 mM co-reactant systems at a GC electrode, IL adsorption occurs at the electrode surface, which results in a change of the polarity of the electrode surface. Such functionalization greatly improves the functions of both Ru(bpy)_(3~(2+)) and ionic liquids, as is demonstrated in the sensitive and selective concentration enrichment of the Ru(bpy)_(3~(2+)) co-reactants.
机译:通过引入离子液体(3,(2,2'-联吡啶基)钌(Ⅱ)(Ru(bpy)_(3〜(2+)))钌络合物获得增强的电化学发光(ECL)效率。 IL)四氟硼酸1-丁基-3-甲基咪唑鎓(BMImBF_4)。在0.1(Ru / bpy)_(3〜(2+))溶液中添加1%(v / v)BMImBF_4后,在氧化铟锡(ITO)电极上均获得最大ECL强度增加(15倍) )和玻璃碳(GC)电极(5至6倍)。此外,添加1%(v / v)的BMImBF_4至5μmRu(bpy)_(3〜(2 +))/ 100在GC电极上的mM共反应体系中,IL吸附发生在电极表面,导致电极表面极性改变,这种官能化极大地改善了Ru(bpy)_(3〜(2+ ))和离子液体,如Ru(bpy)_(3〜(2+))共反应物的敏感和选择性浓度富集所证明的。

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