TY - JOUR
T1 - Electrocatalytic behavior of cobalt phthalocyanine complexes immobilized on glassy carbon electrode towards the reduction of dicrotophos pesticide
AU - Vilakazi, Sibulelo
AU - Nyokong, Tebello
AU - Fukuda, Takamitsu
AU - Kobayashi, Nagao
N1 - Funding Information:
This work was supported by the Department of Science and Technology (DST) and National Research Foundation (NRF), South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology, as well as Rhodes University and MINTEK. SLV thanks The Japan-South Africa cooperation (UID = 63563) for a travel grant.
PY - 2012
Y1 - 2012
N2 - Electrocatalytic properties of cobalt phthalocyanine (CoPc), cobalt tetra-carboxy phthalocyanine (CoTCPc) and cobalt octa-carboxy (CoOCPc), towards the detection of dicrotophos have been studied. Catalytic behavior towards the reduction of dicrotophos was found to be dependent on the pH, as well as the substitution on the phthalocyanine ring. Strong electron withdrawing groups on the phthalocyanine ring yielded best catalysis as evidenced by the enhancement of the reduction peak current, (∼5 fold) compared to the bare glassy carbon electrode. The analysis gave a good detection limit of 1.25 × 10 -7 M, and good linearity for the studied concentration range. A high Tafel slope value was obtained, indicating a strong interaction between dicrotophos and the cobalt phthalocyanine complex.
AB - Electrocatalytic properties of cobalt phthalocyanine (CoPc), cobalt tetra-carboxy phthalocyanine (CoTCPc) and cobalt octa-carboxy (CoOCPc), towards the detection of dicrotophos have been studied. Catalytic behavior towards the reduction of dicrotophos was found to be dependent on the pH, as well as the substitution on the phthalocyanine ring. Strong electron withdrawing groups on the phthalocyanine ring yielded best catalysis as evidenced by the enhancement of the reduction peak current, (∼5 fold) compared to the bare glassy carbon electrode. The analysis gave a good detection limit of 1.25 × 10 -7 M, and good linearity for the studied concentration range. A high Tafel slope value was obtained, indicating a strong interaction between dicrotophos and the cobalt phthalocyanine complex.
KW - cobalt phthalocyanine
KW - cyclic voltammetry
KW - dicrotophos
KW - pesticides
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U2 - 10.1142/S1088424612501040
DO - 10.1142/S1088424612501040
M3 - Article
AN - SCOPUS:84864766209
SN - 1088-4246
VL - 16
SP - 939
EP - 945
JO - Journal of Porphyrins and Phthalocyanines
JF - Journal of Porphyrins and Phthalocyanines
IS - 7-8
ER -