In:
Journal of Porphyrins and Phthalocyanines, World Scientific Pub Co Pte Ltd, Vol. 15, No. 05n06 ( 2011-05), p. 467-479
Abstract:
Three face-to-face biscobalt bisporphyrin dyads, including one incorporating a copper(II) ion inside the linker, were synthesized and characterized both spectroscopically and electrochemically in three non-aqueous solvents, dichloromethane, benzonitrile and pyridine. The electrocatalytic reduction of dioxygen with these derivatives on an electrode surface in 1.0 M HClO 4 was also investigated and the results are compared to that obtained with "regular" Pacman biscobalt bisporphyrins under the same experimental conditions. Surprisingly, the tris-metal species ( Cu-bisCo ) catalyzes the reduction of O 2 mainly via a 2e - transfer process, leading to H 2 O 2 , while the bis-metal (bisCo) catalyst produces H 2 O via a four electron, four proton process.
Type of Medium:
Online Resource
ISSN:
1088-4246
,
1099-1409
DOI:
10.1142/S1088424611003410
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2011