J. Limson et T. Nyokong, VOLTAMMETRIC STUDIES OF SPINACH FERREDOXIN ON A GLASSY-CARBON ELECTRODE MODIFIED WITH COBALT(II) TETRASULFOPHTHALOCYANINE, Electroanalysis, 10(14), 1998, pp. 988-993
Spinach ferredoxin has been studied electrochemically at a glassy carb
on electrode (GCE) modified with cobalt(II) tetrasulfophthalocyanine (
[Co(II)TSPc](4-)). Anodic peak currents due to the oxidation of the cy
steine component of ferredoxin were observed at 0.90 V (vs. Ag/AgCl) (
pH 7.4, HEPES buffer). The magnitudes of the peak currents were depend
ent on pH. Catalytic oxidation of the cysteine component of ferredoxin
were observed at 0.90 V (vs. Ag/AgCl) GCE was modified with cobalt(II
) and oxomolybdenum(V) phthalocyanine [CoPe and OMo(OH)Pc, respectivel
y], and with copper(II) tetrasulfophtalocyanine complexes ([Cu(II)TSPc
](4-)).