Catecholase and phenoxazinone synthase activities of a ferromagnetically coupled tetranuclear Cu() complex

A crystallographically characterized tetranuclear Cu( ii ) complex [Cu II 4 (L) 4 ] ( 1 ) [H 2 L = N -(2-hydroxyethyl)-3-methoxysalicylaldimine] is found to show overall ferromagnetic exchange coupling. Complex ( 1 ) mimics the catalytic activity of the plant enzyme catechol oxidase by oxidising 3,5...

Full description

Saved in:
Bibliographic Details
Published in:RSC advances 2016-01, Vol.6 (63), p.58831-58838
Main Authors: Mitra, Merry, Kundu, Tanay, Kaur, Gurpreet, Sharma, Gyaneswar, Choudhury, Angshuman Roy, Singh, Yogesh, Ghosh, Rajarshi
Format: Article
Language:English
Subjects:
Aerials
Coupling
Dichloromethane
Exchange
Ferromagnetism
Methyl alcohol
Oxidase
Quinones
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A crystallographically characterized tetranuclear Cu( ii ) complex [Cu II 4 (L) 4 ] ( 1 ) [H 2 L = N -(2-hydroxyethyl)-3-methoxysalicylaldimine] is found to show overall ferromagnetic exchange coupling. Complex ( 1 ) mimics the catalytic activity of the plant enzyme catechol oxidase by oxidising 3,5-di- tert -butylcatechol to its corresponding quinone in methanol and dichloromethane medium in the presence of aerial oxygen. The reaction follows Michaelis-Menten enzymatic reaction kinetics with turnover numbers ( K cat ) 6.99 × 10 3 and 1.85 × 10 3 h −1 in methanol and dichloromethane, respectively. 1 is also phenoxazinone synthase active in methanol medium with a turnover number of 1.21 × 10 5 h −1 . A crystallographically characterized tetranuclear Cu( ii ) complex [Cu II 4 (L) 4 ] ( 1 ) [H 2 L = N -(2-hydroxyethyl)-3-methoxysalicylaldimine] is found to show overall ferromagnetic exchange coupling.
ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra11433d