Mono, bis or tris(substituted 2,2'-bipyridine) iron, ruthenium, osmium or vanadium complexes and their methods of preparation
AssigneeAsulab S.A.
InventorsMichael Gratzel, David Fraser, Shaik M. Zakeeruddin, Mohammed K. Nazeeruddin
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Abstract
Mono, bis and tris(substituted 2,2'-bipyridine) complexes of iron, ruthenium, osmium or vanadium are described wherein the bipyridine is substituted by a hydroxy or alkoxy group, or a primary, secondary or tertiary amine group.
Claims24
A mono, bis or tris (4,4'substituted 2,2'-bipyridine) complex of a metal M having the following formula (I) ##STR7## in which M represents iron, ruthenium, osmium or vanadium, R and R' are the same and each is a hydroxy or alkoxy group, or a primary, secondary or tertiary amine group, and L.sub.1', L.sub.2', L.sub.3 and L.sub.4 are ligands forming a coordination complex with the metal M, said ligands being a monodentate or being combined together as a didentate, terdentate or tetradentate.
A mediator composition for coating an electrode of an amperometric sensor wherein said mediator composition comprises a mono, bis or tris (4,4'substituted 2,2'-bipyridine) complex of a metal M having the following formula (I) ##STR11## in which M represents iron, ruthenium, osmium or vanadium, R and R' are the same and each is a hydroxy or alkoxy group, or a primary, secondary or tertiary amine group, and L.sub.1', L.sub.2', L.sub.3 and L.sub.4 are ligands forming a coordination complex with the metal M, said ligands being a monodentate or being combined together as a didentate, terdentate or tetradentate.
Dependencies are inferred from the claim text.