@article {Ngwenya:2019:0095-8972:1131,
title = "A cobalt(II) phthalocyanine with indole substituents: formation, characterization and electrocatalytic studies",
journal = "Journal of Coordination Chemistry",
parent_itemid = "infobike://tandf/gcoo",
publishercode ="tandf",
year = "2019",
volume = "72",
number = "5-6",
publication date ="2019-04-03T00:00:00",
pages = "1131-1145",
itemtype = "ARTICLE",
issn = "0095-8972",
eissn = "1029-0389",
url = "https://www.ingentaconnect.com/content/tandf/gcoo/2019/00000072/f0030005/art00025",
doi = "doi:10.1080/00958972.2019.1599108",
keyword = "electrocatalysis, Cobalt phthalocyanine, bio-interferents, dopamine, indole",
author = "Ngwenya, Vuyelwa and Booysen, Irvin Noel and Mambanda, Allen",
abstract = "Herein, we report the formation of a new cobalt(II) phthalocyanine (CoPc) containing peripheral tetra-substituted indole (CoPc-ind, 2) moieties. The derivatized phthalonitrile, 4-(indole-4-oxy)phthalonitrile (1) as well its corresponding metal complex was characterized
by NMR (for 1), IR and UVVis spectroscopy as well as TOF mass spectrometry and elemental analysis (for 2). The electrochemical properties of the N4-macrocyclic metal complex were investigated using cyclic- and square-wave voltammetry as well as corroborated
by UVVis spectroelectrochemistry. The CoPc was electrodeposited onto the surface of a Pt working electrode followed by the immobilization of multiwalled carbon nanotubes (MWCNTs) onto the modified working electrode surface. The electrocatalytic activity of the resultant modified electrode
toward dopamine revealed a lower E value of 80mV versus Ag|AgCl for the modified (2-MWCNTs) Pt electrode compared to the bare Pt electrode (E=280mV vs. Ag|AgCl). The diffusion- and convection-controlled electron-transfer kinetics
of the chemically modified electrode were evaluated by chronoamperometry and rotating disk electrode techniques. Electrochemical impedance spectroscopic studies revealed that the 2-MWCNTs Pt electrode had a lower charge-transfer resistance and a higher apparent electron-transfer rate
constant.",
}