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A ruthenium(ii) complex based turn-on electrochemiluminescence probe for the detection of nitric oxide

机译:基于钌(ii)配合物的开启式化学发光探针,用于检测一氧化氮

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摘要

Electrochemiluminescence (ECL) detection technique using bipyridine-ruthenium(ii) complexes as probes is a highly sensitive and widely used method for the detection of various biological and bioactive molecules. In this work, the spectral, electrochemical and ECL properties of a chemically modified bipyridine-ruthenium(ii) complex, [Ru(bpy)_2(dabpy)] ~(2+) (bpy: 2,2′-bipyridine; dabpy: 4-(3,4-diaminophenoxy)-2, 2′-bipyridine), were investigated and compared with those of its nitric oxide (NO)-reaction derivative [Ru(bpy)_2(T-bpy)]~(2+) (T-bpy: 4-triazolephenoxy-2,2′-bipyridine) and [Ru(bpy)_3] ~(2+). It was found that the ECL intensity of [Ru(bpy) _2(dabpy)]~(2+) could be selectively and sensitively enhanced by NO due to the formation of [Ru(bpy)_2(T-bpy)]~(2+) in the presence of tri-n-propylamine. By using [Ru(bpy)_2(dabpy)] ~(2+) as a probe, a sensitive and selective ECL method with a wide linear range (0.55 to 220.0 μM) and a low detection limit (0.28 μM) was established for the detection of NO in aqueous solutions and living cells. The results demonstrated the utility and advantages of the new ECL probe for the detection of NO in complicated biological samples.
机译:使用联吡啶-钌(ii)配合物作为探针的电化学发光(ECL)检测技术是检测各种生物和生物活性分子的高度灵敏且广泛使用的方法。在这项工作中,化学修饰的联吡啶-钌(ii)配合物[Ru(bpy)_2(dabpy)]〜(2+)(bpy:2,2'-bipyridine; dabpy:研究了4-(3,4-二氨基苯氧基)-2,2'-联吡啶)并与其一氧化氮(NO)反应衍生物[Ru(bpy)_2(T-bpy)]〜(2+ )(T-bpy:4-三唑苯氧基-2,2'-联吡啶)和[Ru(bpy)_3]〜(2+)。结果发现,由于[Ru(bpy)_2(T-bpy)]〜(的形成,NO可以选择性地和灵敏地增强[Ru(bpy)_2(dabpy)]〜(2+)的ECL强度。 2+)在三正丙胺存在下。通过使用[Ru(bpy)_2(dabpy)]〜(2+)作为探针,建立了灵敏且选择性的ECL方法,该方法具有宽线性范围(0.55至220.0μM)和低检测限(0.28μM),用于检测水溶液和活细胞中的NO。结果表明,新型ECL探针可用于检测复杂生物样品中的NO。

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