Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes

Akinbulu, IAOzoemena, KINyokong, T2012-06-282012-06-282011-10Akinbulu, IA, Ozoemena, KI and Nyokong, T. 2011. Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes. Journal of Solid State Electrochemistry, vol. 15(10), pp 2239-22501432-8488http://www.springerlink.com/content/j5128346512636n4/http://hdl.handle.net/10204/5952Copyright: 2010 Springer-Verlag. This is an ABSTRACT ONLY.Molecular thin films of manganese (SAM-2), iron (SAM-3), and cobalt (SAM-4) phthalocyanine complexes, non-peripherally tetra-substituted with benzylmercapto, were formed on polycrystalline gold disc electrode by selfassembly technique. Surface characteristics of the films were interrogated by cyclic voltammetry. Significant passivation of voltammetry processes associated with bare gold surface (gold oxidation and underpotential deposition of copper) confirmed formation of the films. Electrocatalytic property of the films was evidenced from better voltammetry responses (less positive oxidation potential and better current signal) of the insecticide, carbofuran, on these films, relative to that on bare gold electrode. In terms of less positive oxidation potential, the FePc derivative (3) gave the best response, while the best current signal was observed on SAM-2-modified gold electrode. The average heterogeneous rate constant, k, for the oxidation of carbofuran was 3.6×10-2 cm s-1 on the SAM film with the best current signal (SAM-2).enManganeseIronCobaltBenzylthio phthalocyanineSelf-assembled monolayerCarbofuranFormation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexesArticleAkinbulu, I., Ozoemena, K., & Nyokong, T. (2011). Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes. http://hdl.handle.net/10204/5952Akinbulu, IA, KI Ozoemena, and T Nyokong "Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes." (2011) http://hdl.handle.net/10204/5952Akinbulu I, Ozoemena K, Nyokong T. Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes. 2011; http://hdl.handle.net/10204/5952.TY - Article AU - Akinbulu, IA AU - Ozoemena, KI AU - Nyokong, T AB - Molecular thin films of manganese (SAM-2), iron (SAM-3), and cobalt (SAM-4) phthalocyanine complexes, non-peripherally tetra-substituted with benzylmercapto, were formed on polycrystalline gold disc electrode by selfassembly technique. Surface characteristics of the films were interrogated by cyclic voltammetry. Significant passivation of voltammetry processes associated with bare gold surface (gold oxidation and underpotential deposition of copper) confirmed formation of the films. Electrocatalytic property of the films was evidenced from better voltammetry responses (less positive oxidation potential and better current signal) of the insecticide, carbofuran, on these films, relative to that on bare gold electrode. In terms of less positive oxidation potential, the FePc derivative (3) gave the best response, while the best current signal was observed on SAM-2-modified gold electrode. The average heterogeneous rate constant, k, for the oxidation of carbofuran was 3.6×10-2 cm s-1 on the SAM film with the best current signal (SAM-2). DA - 2011-10 DB - ResearchSpace DP - CSIR KW - Manganese KW - Iron KW - Cobalt KW - Benzylthio phthalocyanine KW - Self-assembled monolayer KW - Carbofuran LK - https://researchspace.csir.co.za PY - 2011 SM - 1432-8488 T1 - Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes TI - Formation, surface characterization, and electrocatalytic application of self-assembled monolayer films of tetra-substituted manganese, iron, and cobalt benzylthio phthalocyanine complexes UR - http://hdl.handle.net/10204/5952 ER -