Jump to main content
Jump to site search


Syntheses, crystal structures, magnetochemistry and catechol oxidase activity of a tetracopper(II) compound and a new type of dicopper(II)-based 1D coordination polymer

Author affiliations

Abstract

This report describes the syntheses, crystal structures, electrospray ionisation mass spectra, catechol oxidase activity and magnetic properties of a tetracopper(II) cluster [CuII4L23-OH)2(NCO)4]·2H2O (1) and a one-dimensional (1D) coordination polymer [{{CuII2L(µ1,1-N3)}21,1-N3)2}(µ1,3-N3)2]n (2) derived from a Schiff base ligand (HL; 1 : 2 condensation product of 4-ethyl-2,6-diformylphenol and 3-morpholinopropylamine). Compound 1 may be considered a dimer of two µ-phenoxo-µ3-hydroxido dicopper(II) units, where the dimerisation takes place through the two µ3-hydroxido moieties. Compound 2 is a µ-phenoxo-µ1,1-azido dicopper(II)-based 1D polymer, where the dicopper(II) units are interlinked by two end-on azide bridges to form a dimer of dinuclear-type tetracopper(II) moieties, which, in turn, are self-assembled by end-to-end azide bridges. Magnetic investigations reveal a strong antiferromagnetic interaction in the dicopper(II) basic unit in both cases, with J values of −382 cm−1 for 1 and −220 cm−1 for 2. Both compounds have been found to be functional models for catechol oxidase activity in N,N-dimethylformamide (DMF) and acetonitrile, with Kcat values around 15 h−1 for 1 and 13 h−1 for 2. Interestingly, compound 2 is a unique example in which a dimer of a dinuclear metal unit is the node for a versatile and well-explored linker, azide, to generate a coordination polymer. It is also interesting that a coordination polymer, 2, has been identified as the functional model of catechol oxidase activity.

Graphical abstract: Syntheses, crystal structures, magnetochemistry and catechol oxidase activity of a tetracopper(ii) compound and a new type of dicopper(ii)-based 1D coordination polymer

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 26 Jan 2017, accepted on 02 May 2017 and first published on 03 May 2017


Article type: Paper
DOI: 10.1039/C7NJ00286F
Citation: New J. Chem., 2017, Advance Article
  •   Request permissions

    Syntheses, crystal structures, magnetochemistry and catechol oxidase activity of a tetracopper(II) compound and a new type of dicopper(II)-based 1D coordination polymer

    L. Mandal, S. Mandal and S. Mohanta, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ00286F

Search articles by author