以二茂铁季铵盐为活性材料的PVC膜高氯酸根电极的研制

Study On PVC Membrane Perchlorate Selective Electrodes Using Ferrocene Quaternary Ammonium Salts as Electroactive Material

二茂铁季铵盐作为离子缔合型选择电极的活性材料至今未见报导.本文试用六种二茂铁季铵盐和两种增塑剂制备了高氯酸根电极,其中三种二茂铁季铵盐制成的电极的性能比较好,达到目前报导的较好高氯酸根电极的水平.二茂铁(Ferrocene)是一种具有特殊化学性质和空间构型的化合物.由于二茂铁基分子量较大,增水性强,生成的缔合物水溶性小,二茂铁基能够分散电荷,使得离子缔合体的缔合常数增大.以不同结构的二茂铁季铵盐作为电极的活性材料,有可能改变电极的某些性质并提供新的信息.

In this paper,Ferrocene quaternary ammouium salts are intoduced as ino-assoclate electroactive materi- al.Six Ferrocene quaternary ammouium salts and two plasticizers DBP and DNF are studied for porchlorate ion selective electrode.The best perchorate electrode exhibits Nernstian responses with a slope of 58mv/ decade (18℃) over the concentration 10^(-5)Mol/L to 10^(-1)Mol/L in the pH range from 2.0 to 12.0.The detection limit is down to 2.2×10^(-5)Mol/L.The selectivtity and stabiliy of the electrodes are superior.The results showed ferrocene quaternary ammonivm salts are good electoactice material.