Triggerable single-component two-electrode voltammetric pH sensors using dyad molecules
Triggerable single-component two-electrode voltammetric pH sensors using dyad molecules
复制标题
使用二元分子的可触发单组件双电极伏安 pH 传感器
DOI：
10.1016/j.elecom.2012.10.025
复制
发表时间：
2013
影响因子：
5.4
通讯作者：
Sunghyun Kim
中科院分区：
文献类型：
--
作者：
Wonchoul Park;Sunghyun Kim
我们合成了两种类型的甲氧基苯酚硫醇，Fc-MP 1和Fc-MP2，将它们用于伏安pH传感器。甲氧基苯酚基团被氧化引发为邻醌。因此，形成的二联体分子可能的pH值测量的基础上，醌（pH指示剂）和二茂铁（pH参考）部分之间的正式电位差的pH值依赖性。即使在没有参比电极的双电极模式下，也可以在宽pH范围内进行精确的pH测量。在金属对电极如Au和Pt中发现的大的极化效应通过简单地使用惰性烷醇作为稀释剂形成混合单分子层来去除。Fc-MP 1和Fc-MP2是互补的，因为Fc-MP2覆盖了由于Fc+/Fc和Q/H2 Q氧化还原过程之间的潜在重叠而不能被Fc-MP 1接近的pH区域。经方差分析，估计误差在0.03 ~ 0.06pH单位之间。
We have synthesized two types of methoxyphenol thiols, Fc-MP1 and Fc-MP2 to use them in a voltammetric pH sensor. The methoxyphenol group was oxidatively triggered to o-quinone. Thus formed dyad molecules made possible pH measurements based on the pH-dependence of formal potential difference between quinone (pH indicator) and ferrocene (pH reference) moieties. Precise pH measurements over a wide pH range were possible even in a two-electrode mode without a reference electrode. The large polarization effect found in metal counter electrodes such as Au and Pt was removed by simply forming a mixed monolayer using an inert alkanethiol as a diluent. Fc-MP1 and Fc-MP2 were complementary in that Fc-MP2 covers the pH region that was not accessed by Fc-MP1 because of the potential overlap between the Fc+/Fc and Q/H2Q redox processes. The estimated errors were in the range of 0.03 to 0.06pH units from the analysis of varience.