The synthesis and electrochemical behaviour of water soluble manganese phthalocyanines: Anion radical versus Mn(I) species

Sehlotho, N. and Durmuş, M. and Ahsen, N. and Nyokong, T. (2008) The synthesis and electrochemical behaviour of water soluble manganese phthalocyanines: Anion radical versus Mn(I) species. Inorganic Chemistry Communications, 11 (5). pp. 479-483. ISSN 1387-7003

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Official URL: http://dx.doi.org/10.1016/j.inoche.2008.01.029

Abstract

The following MnPc derivatives were synthesized: 1,(4)-tetra-(2-mercaptopyridine) phthalocyaninato manganese(III)(OH) (5a), quaternized 1,(4)-tetra-(2-mercaptopyridine) phthalocyaninato manganese(III)(OH) (5b), 2,(3)-tetra-(2-mercaptopyridine) phthalocyaninato manganese(III)(OH) (6a) and quaternized 2,(3)-tetra-(2-mercaptopyridine) phthalocyaninato manganese(III)(OH)(6b). Spectro-electrochemistry shows that the reduction of Mn(II)Pc to Mn(I)Pc occurs only when the complexes are in their quaternized form (5b and 6b). The reduction (to Mn(I)Pc(−2)) of the quaternized form occurs at a lower potential than that (to Mn(II)Pc(−3)) of the unquaternized form. This observation suggests that metal reduction (to Mn(I)Pc(−2)) versus ligand reduction (to Mn(II)Pc(−3)) in Mn(II)Pc complexes depends on the nature of the ring substituents.

Item Type:Article
Uncontrolled Keywords:Cyclic voltammetry; Manganese phthalocyanine; Metal reduction; Spectroelectrochemistry
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Chemistry
ID Code:1018
Deposited By: Mrs Eileen Shepherd
Deposited On:24 Jun 2008
Last Modified:06 Jan 2012 16:19
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