A gold-gold oil microtrench electrode for liquid-liquid anion transfer voltammetry.
A gold-gold oil microtrench electrode for liquid-liquid anion transfer voltammetry.
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用于液-液阴离子转移伏安法的金-金油微沟槽电极。
DOI：
10.1002/elps.201300071
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发表时间：
2013
期刊：
影响因子：
2.9
通讯作者：
Dale SE
中科院分区：
文献类型：
--
作者：
Dale SE
将两个平坦的金电极与环氧树脂间隔层维斯放置，环氧树脂间隔层被蚀刻掉以给出ca. 100 μm深的电化学活性沟槽。将水不溶性油相（此处为4-（3-苯丙基）-吡啶（PPP）中的氧化还原体系N，N-二乙基-N′N′-双十二烷基-苯二胺（DDPD））固定到沟槽中，以允许DDPD（油）氧化成DDPD+（油）时的阴离子转移。在“单恒电位模式”下，发生阴离子向地沟油相中的定量转移/排出。然而，在“双恒电位模式”中，观察到由垂直于电极表面的快速板对板扩散主导的反馈电流。比较“正常”扩散和“横向”扩散表明，跨油膜的扩散-迁移电荷传输速率是阴离子疏水性依赖的。
Two flat gold electrodes are placed vis‐à‐vis with an epoxy spacer layer that is etched out to give a ca. 100 μm‐deep electrochemically active trench. A water‐insoluble oil phase, here the redox systemN,N‐diethyl‐N′N′‐didodecyl‐phenylenediamine (DDPD) in 4‐(3‐phenylpropyl)‐pyridine (PPP), is immobilized into the trench to allow anion transfer upon oxidation of DDPD (oil) to DDPD+(oil). In “mono‐potentiostatic mode” quantitative transfer/expulsion of anions into the trench oil phase occurs. However, in “bi‐potentiostatic mode” feedback currents dominated by rapid plate‐to‐plate diffusion normal to the electrode surfaces are observed. Comparison of “normal” diffusion and “lateral” diffusion shows that the rate of diffusion–migration charge transport across the oil film is anion hydrophobicity dependent.