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Characterization of manganese tetraarylthiosubstituted phthalocyanines self assembled monolayers |
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| Authors: | Fungisai Matemadombo Chamunorwa Togo Tebello Nyokong |
| Affiliation: | a Chemistry Department, Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa b Gebze Institute of Technology, Department of Chemistry, P.O. Box: 141, 41400 Gebze-Kocaeli, Turkey c Biochemistry, Microbiology and Biotechnology Department, Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa |
| Abstract: | Manganese tetraarylthiosubstituted phthalocyanines (complexes 1-5) have been deposited on Au electrode surfaces through the self assembled monolayer (SAM) technique. SAM characteristics reported in this work are: ion barrier factor (∼1); interfacial capacitance (303-539 μF cm−2) and surface coverage (1.06 × 10−10-2.80 × 10−10 mol cm−2). Atomic force microscopy was employed in characterizing a SAM. SAMs of complexes 1-5 were employed to detect l-cysteine (with limit of detection ranging from 2.83 × 10−7 to 3.14 × 10−7 M at potentials of 0.68-0.75 V vs. Ag|AgCl) and nitrite (limit of detection ranging from 1.78 × 10−7 to 3.02 × 10−7 M at potentials of 0.69-0.76 V vs. Ag|AgCl). |
| Keywords: | Tetraarylthiosubstituted phthalocyanine Manganese Self-assembled monolayer Atomic force microscopy Cyclic voltammetry Cysteine Nitrite |
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