Perchlorate-Selective Polymeric Membrane Sensor based on UnsymmetricalSchiff Base of N2 O2 Cu (II) Complex

Unsymmetrical Cu (II) complex ((2E, 3E)-N-salicylidene-N’-(2-hydroxyphenylmethylieden) 1, 2-phenylenediamino Cu (II)) was synthesized and was studied to characterize its potential as an anion carrier in a PVC membrane electrode. The polymeric membrane electrode prepared with unsymmetrical Cu (II) complex showed excellent response characteristics to perchlorate ion. The electrode exhibited Nerstian responses to ClO4- ion over a wide concentration range from 1.0 x 10-1 to 1.0 x 10-6 M. The response time of the electrode was fast ( 5S) and the membrane could be used for over 3 months in a PH range of 5-10.The electrode exhibits fast response time, good sensitivity, low detection limit, long stability, appropriate selectivity toward ClO4- relative to a variety of other common anions.