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首页> 外文期刊>Electroanalysis >Electrogenerated chemiluminescence of Lucigenin in ethanol solution at a polycrystalline gold electrode
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Electrogenerated chemiluminescence of Lucigenin in ethanol solution at a polycrystalline gold electrode

机译：荧光素在多晶金电极上的乙醇溶液中的电化学发光

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摘要

The electrogenerated chemiluminescence (ECL) behavior of lucigenin in ethanol solution at a polycrystalline gold electrode was studied under conventional cyclic voltarnmetric conditions. Compared with the ECL of lucigenin in aqueous solution, one cathodic ECL peak (ECL-1 at - 0.98 V versus SCE) with a shoulder (S-1 at - 0.42 V) and three new anodic ECL peaks (ECL-2 at - 0.53 V, ECL-3 at 0.20 V, and ECL-4 at 0.51 V) were observed, respectively, on the curve of ECL intensity versus potential. ne effects of initial potential scan direction, the presence of 02 or N-2, potential scan ranges, supporting electrolyte and the concentration of lucigenin on these ECL peaks were examined. The electrochemistry of lucigenin in ethanol solution was also studied. The emitter of all ECL peaks was identified as N-methylacridone (NMA) by analyzing the ECL spectra. The mechanism for these ECL peaks is proposed to be due to the reactions of lucigenin and its redox products such as Luc(center dot+) and DBA with dissolved oxygen or O-2(center dot-) electrogenerated by the dissolved oxygen at different potentials. The formation of new anodic ECL peaks in ethanol solution is due to longer lifetime of superoxide ions and easier electro-oxidation of DBA in nonaqueous solution, revealing that the solvent plays an important role in the lucigenin ECL reactions.
机译：在常规循环伏安法条件下研究了光泽精在乙醇溶液中多晶金电极上的电化学发光（ECL）行为。与光泽精的ECL相比，水溶液中有一个阴极ECL峰（ECL-1为-0.98 V，相对于SCE）和一个肩峰（S-1为-0.42 V）和三个新的阳极ECL峰（ECL-2为-0.53）在ECL强度与电位的关系曲线上分别观察到V，0.20 V的ECL-3和0.51 V的ECL-4。检查了初始电势扫描方向，O 2或N-2的存在，电势扫描范围，支持电解质以及这些ECL峰上的光泽精浓度的影响。还研究了光泽精在乙醇溶液中的电化学。通过分析ECL光谱，将所有ECL峰的发射体识别为N-甲基ac啶酮（NMA）。提出这些ECL峰的机理是由于光泽精及其氧化还原产物（Luc（中心点+）和DBA与溶解氧或由溶解氧在不同电势下产生的O-2（中心点））的反应。乙醇溶液中新的阳极ECL峰的形成是由于超氧化物离子的寿命更长，以及非水溶液中DBA的更容易电氧化所致，表明该溶剂在光黄蛋白原ECL反应中起着重要作用。

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