scholarly journals Recent advances in phenoxyl radical complexes of salen-type ligands as mixed-valent galactose oxidase models

2013 ◽  
Vol 257 (2) ◽  
pp. 528-540 ◽  
Author(s):  
Christopher T. Lyons ◽  
T. Daniel P. Stack
Keyword(s):  
Phenoxyl Radical ◽  
Galactose Oxidase ◽  
Recent Advances

Properties of the one-electron oxidized copper(II) salen-type complexes: relationship between electronic structures and reactivities

2014 ◽  
Vol 86 (2) ◽  
pp. 163-172 ◽  
Author(s):  
Yuichi Shimazaki
Keyword(s):  
Electronic Structure ◽  
Electronic Structures ◽  
Functional Model ◽  
Phenoxyl Radical ◽  
Catalytic Cycle ◽  
Model Systems ◽  
Galactose Oxidase ◽  
Primary Alcohols ◽  
Radical Species ◽  
The One

Abstract The Cu(II)-phenoxyl radical formed during the catalytic cycle of galactose oxidase (GO) attracted much attention, and the structures and properties of a number of metal-phenoxyl radical complexes have been studied. Some of the functional model systems of GO reported previously have shown that the Cu complexes oxidize primary alcohols to aldehydes and that the Cu(II)-phenoxyl radical species is formed in the catalytic cycle. Many Cu(II)-phenoxyl radical species have been produced by one-electron oxidation of the Cu(II)-phenolate complexes. On the other hand, one-electron oxidation of a Cu(II)-phenolate complex has the possibility to give different electronic structures, one of which is the Cu(III)-phenolate. From these points of view, this micro review is focused on the one-electron oxidized square-planar Cu(II) complexes of the salen-type ligands. Introduction of substituents into the phenolate moieties and conversion from a 5- to a 6-membered chelate backbone alter the electronic structure of the one-electron oxidized Cu(II) complexes and give rise to a different reactivity of benzyl alcohol oxidation. The relationship between the electronic structure and the reactivity is herein discussed.

Formation of a Cu(II)–phenoxyl radical complex from a Cu(II)–phenolate complex: A new model for galactose oxidase

Polyhedron ◽  
2013 ◽  
Vol 51 ◽  
pp. 222-227 ◽  
Author(s):  
Rajib Kumar Debnath ◽  
Apurba Kalita ◽  
Pankaj Kumar ◽  
Biplab Mondal ◽  
Jatindra Nath Ganguli
Keyword(s):  
Phenoxyl Radical ◽  
Galactose Oxidase ◽  
New Model ◽  
Radical Complex
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