Voltammetric and spectroelectrochemical characterization of porphyrazines: Electrochemical metal sensor


KOCA A., Gonca E., Guel A.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.612, sa.2, ss.231-240, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 612 Sayı: 2
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.jelechem.2007.09.028
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.231-240
  • Anahtar Kelimeler: porphyrazine, spectroelectrochemistry, cyclic voltammetry, silver, palladium, metal sensor, PHTHALOCYANINE, COBALT, MANGANESE, BEHAVIOR, REDUCTION, COMPLEXES, LIGANDS, BINDING, RINGS
  • Marmara Üniversitesi Adresli: Evet

Özet

Voltammetric and spectroelectrochemical characterization of the metallo-porphyrazines (M = 2H(+), Mg2+, CU2+, Zn2+ and Co2+) substituted with eight (1-naphthylmethylthio) groups on the peripheral positions are described. Cyclic voltammetry and differential pulse voltammetry studies show that while metal-free, magnesium, zinc, and copper porphyrazine complexes give three ligand-based reductions and one ligand-based oxidation couple having diffusion controlled one-electron reversible character, cobalt porphyrazine gives both metal-based and ligand-based reduction and oxidation couples. Assignments of the redox couples were confirmed by spectroelectrochemical measurements. Distinctive voltammetric and spectroscopic changes during titration of the cobalt porphyrazine with soft metal Ag+ and Pd2+, show the metal sensing properties of the complexes. (c) 2007 Elsevier B.V. All rights reserved.