化学
电化学发光
量子点
过氧化物
光化学
消灭
羟基自由基
纳米技术
激进的
有机化学
电极
量子力学
物理化学
物理
材料科学
作者
Hui Jiang,Huangxian Ju
摘要
This work elucidated the detailed electrochemiluminescence (ECL) process of the thioglycolic acid-capped CdSe quantum dots (QDs) film/peroxide aqueous system. The QDs were first electrochemically reduced to form electrons-injected QDs ∼ −1.1 V, which then reduced hydrogen peroxide to produce OH• radical. The intermediate OH• radical was a key species for producing holes-injected QDs. The ECL emission with a peak at −1.114 V was demonstrated to come from the 1Se−1Sh transition emission. Using thiol compounds as the model molecules to annihilate the OH• radical, their quenching effects on ECL emission were studied. This effect led to a novel strategy for ECL sensing of the scavengers of hydroxyl radical. The detection results of thiol compounds showed high sensitivity, good precision, and acceptable accuracy, suggesting the promising application of the proposed method for quick detection of both scavengers and generators of hydroxyl radical in different fields.
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