Electrochemical investigation of 4 '-haloderivatives of N,N-dimethyl-4-aminoazobenzene

Ucar M., Solak A., Aksu M., Toy M.

TURKISH JOURNAL OF CHEMISTRY, cilt.26, sa.4, ss.509-520, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 4
  • Basım Tarihi: 2002
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.509-520
  • Anahtar Kelimeler: azo compounds, polarography, cyclic voltammetry, rate constant, adsorption, VOLTAMMETRIC DETERMINATION, AZO-COMPOUNDS, CHEMICAL CARCINOGENS, AZOBENZENE DERIVATIVES, POLAROGRAPHIC-BEHAVIOR, CYCLIC VOLTAMMETRY, METAL-COMPLEXES, ELECTRODE
  • Gazi Üniversitesi Adresli: Hayır

Özet

In this study, the electrochemical behaviour of 4'-halogene-N,N-dimethyl-4-aminoazobenzene derivatives were investigated using various polarographic and voltammetric methods. The peak potentials of these derivatives were observed to shift towards negative values with increase in pH. The standard rate constants were determined with (Laviron technique) or without (Nicholson and Klingler-Kochi techniques) taking the adsorption phenomena into account. The diffusion coefficients were calculated from the cyclic voltammetric data using the method developed by Garrido. The amount of adsorbed substances (surface excess values) and transfer coefficients for the electron transfer were also determined. These compounds can be quantitatively determined between 1 x 10(-5) M to 2 x 10(-7) M with DPP.