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Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction

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dc.contributor.author Ozoemena, KI
dc.contributor.author Mamuru, SA
dc.contributor.author Fukuda, T
dc.contributor.author Kobayashi, N
dc.contributor.author Nyokong, T
dc.date.accessioned 2009-09-11T14:43:49Z
dc.date.available 2009-09-11T14:43:49Z
dc.date.issued 2009-06
dc.identifier.citation Ozoemena, KI, Mamuru, SA, Fukuda, T, Kobayashi, N and Nyokong, T. 2009. Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction. Electrochemistry Communications, Vol. 11(6). pp 1221-1225 en
dc.identifier.issn 1388-2481
dc.identifier.uri http://hdl.handle.net/10204/3583
dc.description Copyright: 2009 Elsevier en
dc.description.abstract Novel hexabutylsulphonyltribenzotetraazachlorin–fullerene (C60) complexes of iron (FeHBSTBTAC–C60) and cobalt (CoHBSTBTAC–C60) have been synthesized and their electrochemistry and oxygen reduction reaction (ORR) compared with their octabutylsulphonylphthalocyanine analogues (FeOBSPc and CoOBSPc). It is proved that electron-withdrawing substituents (–SO2Bu and C60) on phthalocyanine macrocycle exhibit distinct impact on the solution electrochemistry of these metallophthalocyanine (MPc) complexes. The more electron-withdrawing C60 substituent suppressed ORR compared to the –SO2Bu in alkaline medium. FeOBSPc showed the best ORR activity involving a direct 4-electron mechanism, a rate constant of ~1 x 108 cm3 mol-1 s-1 and a Tafel slope of -171 mV dec-1. en
dc.language.iso en en
dc.publisher Elsevier en
dc.subject Cyclic voltammetry en
dc.subject RDE experiment en
dc.subject Oxygen reduction en
dc.subject Metal (Fe, Co) phthalocyanine–C60 en
dc.subject Electron bonding en
dc.subject Electrochemistry Communications en
dc.subject Electrochemistry en
dc.subject Tribenzotetraazachlorin-fullerene conjugates en
dc.title Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction en
dc.type Article en
dc.identifier.apacitation Ozoemena, K., Mamuru, S., Fukuda, T., Kobayashi, N., & Nyokong, T. (2009). Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction. http://hdl.handle.net/10204/3583 en_ZA
dc.identifier.chicagocitation Ozoemena, KI, SA Mamuru, T Fukuda, N Kobayashi, and T Nyokong "Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction." (2009) http://hdl.handle.net/10204/3583 en_ZA
dc.identifier.vancouvercitation Ozoemena K, Mamuru S, Fukuda T, Kobayashi N, Nyokong T. Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction. 2009; http://hdl.handle.net/10204/3583. en_ZA
dc.identifier.ris TY - Article AU - Ozoemena, KI AU - Mamuru, SA AU - Fukuda, T AU - Kobayashi, N AU - Nyokong, T AB - Novel hexabutylsulphonyltribenzotetraazachlorin–fullerene (C60) complexes of iron (FeHBSTBTAC–C60) and cobalt (CoHBSTBTAC–C60) have been synthesized and their electrochemistry and oxygen reduction reaction (ORR) compared with their octabutylsulphonylphthalocyanine analogues (FeOBSPc and CoOBSPc). It is proved that electron-withdrawing substituents (–SO2Bu and C60) on phthalocyanine macrocycle exhibit distinct impact on the solution electrochemistry of these metallophthalocyanine (MPc) complexes. The more electron-withdrawing C60 substituent suppressed ORR compared to the –SO2Bu in alkaline medium. FeOBSPc showed the best ORR activity involving a direct 4-electron mechanism, a rate constant of ~1 x 108 cm3 mol-1 s-1 and a Tafel slope of -171 mV dec-1. DA - 2009-06 DB - ResearchSpace DP - CSIR KW - Cyclic voltammetry KW - RDE experiment KW - Oxygen reduction KW - Metal (Fe, Co) phthalocyanine–C60 KW - Electron bonding KW - Electrochemistry Communications KW - Electrochemistry KW - Tribenzotetraazachlorin-fullerene conjugates LK - https://researchspace.csir.co.za PY - 2009 SM - 1388-2481 T1 - Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction TI - Metal (Co, Fe) tribenzotetraazachlorin-fullerene conjugates: impact of direct p-bonding on the redox behaviour and oxygen reduction reaction UR - http://hdl.handle.net/10204/3583 ER - en_ZA


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