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Voltammetric Studies of Spinach Ferredoxin on a Glassy Carbon Electrode Modified with Cobalt(II) Tetrasulfophthalocyanine
Author(s) -
Limson Janice,
Nyokong Tebello
Publication year - 1998
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(199810)10:14<988::aid-elan988>3.0.co;2-p
Subject(s) - ferredoxin , spinach , cobalt , chemistry , inorganic chemistry , glassy carbon , catalysis , electrochemistry , copper , nuclear chemistry , electrode , cyclic voltammetry , organic chemistry , biochemistry , enzyme
Spinach ferredoxin has been studied electrochemically at a glassy carbon electrode (GCE) modified with cobalt(II) tetrasulfophthalocyanine ([Co(II)TSPc] 4− ). Anodic peak currents due to the oxidation of the cysteine component of ferredoxin were observed at 0.90 V (vs. Ag/AgCl) (pH 7.4, HEPES buffer). The magnitudes of the peak currents were dependent on pH. Catalytic oxidation of ferredoxin was also observed when the GCE was modified with cobalt(II) and oxomolybdenum(V) phthalocyanine [CoPc and OMo(OH)Pc, respectively], and with copper(II) tetrasulfophthalocyanine complexes ([Cu(II)TSPc] 4− ).