Electrochemical preparation of semipermeable polymer membranes on carbon fiber microelectrodes for selective amperometric detection of cations
Electrochemical preparation of semipermeable polymer membranes on carbon fiber microelectrodes for selective amperometric detection of cations
复制标题
碳纤维微电极上电化学制备半透聚合物膜用于选择性电流检测阳离子
DOI：
10.1002/bbpc.19920960809
复制
发表时间：
1992
影响因子：
9.2
通讯作者：
M. Josowicz
中科院分区：
文献类型：
--
作者：
K. Potje;M. Josowicz
介绍了一种在超微电极上原位制备和沉积半透膜的电化学方法。该膜基于带有羧基和磺酸基的聚（氧亚苯基）的基质，即聚（1，2-氧亚苯基-4-磺酸）或聚（1，2-氧亚苯基-3-羧酸）。这些膜表现出阳离子交换行为，而阴离子的传输被抑制。Ru（NH_3）_6·3+在半透膜中的扩散系数可用计时电流法和稳态法测定。测得的数值范围为1.0-6.9 · 10−7 cm 2/s。阳离子通过膜的渗透性很高。因此，没有观察到由于附着的膜引起的伏安响应的失真。它示出的传输速率可以调制的官能化的酚类单体与不同量的交联剂的共聚。用上述膜修饰的超微电极可用作电流型传感器，显示线性电流/浓度关系。
An electrochemical procedure is presented for in situ preparation and subsequent deposition of semipermeable membranes on ultramicroelectrodes. The membranes are based on a matrix of poly(oxyphenylene) bearing carboxyl and sulfonic groups, i.e. poly(1,2-oxyphenylene-4-sulfonic acid) or poly(1,2-oxyphenylene-3-carboxylic acid). These membranes exhibit a cation exchange behavior whereas the transport of anions is inhibited. The diffusion coefficients of Ru(NH3)6·3+ within the semipermeable membranes could be estimated by means of chronoamperometric and steady-state measurements. The values obtained are in the range of 1.0–6.9 · 10−7 cm2/s. The permeability of the cation through the membranes is high. Therefore, no distortion of the voltammetric response due to the attached membrane is observed. It is shown that the transport rate can be modulated by copolymerization of the functionalized phenolic monomer with varying amounts of a cross-linking agent. The ultramicroelectrodes modified with the above membranes can be used as amperometric sensors displaying a linear current/concentration relationship.
影响因子：
7.4
作者：
Zimmerman Jb;Wightman Rm
通讯作者：
Zimmerman Jb;Wightman Rm
影响因子：
7.4
作者：
KRISTENSEN, EW;KUHR, WG;WIGHTMAN, RM
通讯作者：
WIGHTMAN, RM