Issue 63, 2016
From the journal:

RSC Advances

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

Merry Mitra,a   Tanay Kundu,‡b   Gurpreet Kaur,§c   Gyaneswar Sharma,d   Angshuman Roy Choudhury,c   Yogesh Singhd  and  Rajarshi Ghosh*a  

* Corresponding authors

a Department of Chemistry, The University of Burdwan, Burdwan 713 104, India
E-mail: rghosh@chem.buruniv.ac.in

b Physical/Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India

c Department of Chemical Sciences, Indian Institute of Science Education & Research, Mohali, Sector 81, S.A.S. Nagar, Knowledge City, Manauli PO, Mohali 140 306, India

d Department of Physical Sciences, Indian Institute of Science Education & Research, Mohali, Sector 81, S.A.S. Nagar, Knowledge City, Manauli PO, Mohali 140 306, India

Abstract

A crystallographically characterized tetranuclear Cu(II) complex [CuII4(L)4] (1) [H2L = 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 (Kcat) 6.99 × 103 and 1.85 × 103 h−1 in methanol and dichloromethane, respectively. 1 is also phenoxazinone synthase active in methanol medium with a turnover number of 1.21 × 105 h−1.

Graphical abstract: Catecholase and phenoxazinone synthase activities of a ferromagnetically coupled tetranuclear Cu(ii) complex

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Article information

DOI
https://doi.org/10.1039/C6RA11433D
Article type
Paper
Submitted
03 May 2016
Accepted
13 Jun 2016
First published
21 Jun 2016

RSC Adv., 2016,6, 58831-58838

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

M. Mitra, T. Kundu, G. Kaur, G. Sharma, A. R. Choudhury, Y. Singh and R. Ghosh, RSC Adv., 2016, 6, 58831 DOI: 10.1039/C6RA11433D

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