Synthesis and electrochemical characterisation of benzyl mercapto and dodecylmercapto tetra substituted cobalt, iron, and zinc phthalocyanines complexes

Nyokong, T. and Ozoemena, K.I. and Agboola, B. (2006) Synthesis and electrochemical characterisation of benzyl mercapto and dodecylmercapto tetra substituted cobalt, iron, and zinc phthalocyanines complexes. Electrochimica Acta, 51 . pp. 4379-4387. ISSN 0013-4686

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Abstract

The work reports on cyclic voltammetry (CV), square wave voltammetry and spectroelectrochemistry of the following complexes: tetrakis (benzyl mercapto) phthalocyanine complexes of Zn(II) (ZnTBMPc, 4a ), Co(II) (CoTBMPc, 5a ), Fe(II) (FeTBMPc 6a ); and tetrakis (dodecylmercapto) phthalocyanine complexes of Zn(II) (ZnTDMPc, 4b), Co(II) (CoTDMPc, 5b) and Fe(II) (FeTDMPc, 6b). More reversible CV couples were observed for complexes 4a, 5a and 6a containing thiol phenyl ring substituents. Complexes 4b, 5b and 6b containing long chain thiol substituents showed less reversible couples. Complexes 6a and 6b showed a relatively large number of redox processes (5 for 6a and 6 for 6b) within the potential window employed in this work. The processes for FePc derivatives (6a) are assigned to FeIIIPc-1/FeIIIPc-2, FeIIIPc-2/FeIIPc-2, FeIIPc-2/FeIPc-2, FeIPc-2/FeIPc-3 and FeIPc-3/FeIPc-4 and for the CoPc derivative (5a) to CoIIIPc-1/CoIIIPc-2, CoIIIPc-2/CoIIPc-2, CoIIPc-2/CoIPc-2 and CoIPc-2/CoIPc-3.

Item Type:Article
Uncontrolled Keywords:Benzylmercapto phthalocyanine; dodecylmercapto phthalocyanine; Cobalt; Iron; cyclic voltammetry; spectroelectrochemistry
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Chemistry
ID Code:229
Deposited By: Prof Tebello Nyokong
Deposited On:22 Jun 2006
Last Modified:06 Jan 2012 16:17
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