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Issue 1, 2014
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Structural re-arrangement in two hexanuclear CuII complexes: from a spin frustrated trigonal prism to a strongly coupled antiferromagnetic soluble ring complex with a porous tubular structure

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Abstract

The addition of water to a chloroform solution of the Cu6 trigonal prism complex [Cu66F)(μ2OH)(μ3OCH3)22OCH3)2(3,5-Me2pz)6] (1) (3,5-Me2pz = 3,5-dimethylpyrazolate) results in the formation of the Cu6 planar hexagonal ring complex [Cu62OH)6(3,5-Me2pz)6]·CH3CN·CHCl3 (2). A simple mechanism for this structural re-arrangement is proposed, in which 2 can be viewed as a hydrolysis product of 1. This process is clearly noticeable in the magnetic properties, which change from spin frustrated with a weak antiferromagnetic coupling in 1, to strongly antiferromagnetic in 2. Interestingly, the hexagonal ring complex 2 self-assembles in the solid state to form a porous hexagonal tubular structure containing guest solvent molecules that can be removed and CO2-exchanged without loss of crystallinity.

Graphical abstract: Structural re-arrangement in two hexanuclear CuII complexes: from a spin frustrated trigonal prism to a strongly coupled antiferromagnetic soluble ring complex with a porous tubular structure

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Article information


Submitted
19 Sep 2013
Accepted
26 Sep 2013
First published
01 Oct 2013

Chem. Sci., 2014,5, 324-332
Article type
Edge Article

Structural re-arrangement in two hexanuclear CuII complexes: from a spin frustrated trigonal prism to a strongly coupled antiferromagnetic soluble ring complex with a porous tubular structure

W. Cañon-Mancisidor, C. J. Gómez-García, G. M. Espallargas, A. Vega, E. Spodine, D. Venegas-Yazigi and E. Coronado, Chem. Sci., 2014, 5, 324
DOI: 10.1039/C3SC52628C

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