Electrochemical metal-ion sensor based on a cobalt phthalocyanine complex captured in Nafion (R) on a glassy carbon electrode


Ceken B., KANDAZ M., KOCA A.

JOURNAL OF COORDINATION CHEMISTRY, cilt.65, ss.3383-3394, 2012 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 65 Konu: 19
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1080/00958972.2012.716517
  • Dergi Adı: JOURNAL OF COORDINATION CHEMISTRY
  • Sayfa Sayısı: ss.3383-3394

Özet

This article describes an electrochemical metal-ion sensor based on a cobalt phthalocyanine (CoPc) complex and determination of its sensor activity for some transition metal ions. Ag+ and Hg2+, among several transition metal ions, coordinate to the sulfur donors of CoPc and alter the electrochemical responses of CoPc in solution, indicating possible application of the complex as Ag+ and Hg2+ sensor. For practical application, CoPc was encapsulated into a polymeric cation exchange membrane, Nafion, on a glassy carbon electrode and used as an electrochemical coordination element. This composite electrode was potentiometrically optimized and potentiometrically and amperometrically characterized as transition metal-ion sensors with respect to reproducibility, repeatability, stability, selectivity, linear concentration range, and sensitivity. A mu mol dm(-3) sensitivity of the CoPc-based sensor indicates its possible practical application for the determination of Ag+ and Hg2+ in waste water samples.