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Issue 20, 2010
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One dimensional assembly of Mn6 single molecule magnets linked by oligothiophene bridges

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Abstract

A new 1D coordination polymer comprised of [MnIII6O2(Et-sao)6(EtOH)4(H2O)2]2+ units and bithiophene dicarboxylato was synthesized by mixing EtsaoH2 (salicylaldoxime), H2btda (2,2′-bithiophene-5,5′-dicarboxylic acid) and Mn(ClO4)2·6H2O in the presence of NEt4OH. The crystal structure was determined and consists of Mn6 clusters bridged by the bithiophene dicarboxylato ligands coordinated to two of the MnIII ions of the Mn6 polynuclear complex. Direct current magnetic measurements show an overall ferromagnetic interaction between the MnIII ions within the Mn6 cluster leading to an S = 12 ground state for the Mn6 unit. Furthermore, this compound presents single-molecule magnet behaviour. Slow relaxation of the magnetization is observed at low temperature following a thermal activated regime with Ueff≈ 50 K and τ0≈ 2.2 10−10 s. The magnetic measurements do not show any noticeable interaction between the Mn6 clusters through the bithiophene dicarboxylato bridges.

Graphical abstract: One dimensional assembly of Mn6 single molecule magnets linked by oligothiophene bridges

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Supplementary files

Article information


Submitted
27 Feb 2010
Accepted
22 Apr 2010
First published
26 Apr 2010

Dalton Trans., 2010,39, 4751-4756
Article type
Paper

One dimensional assembly of Mn6 single molecule magnets linked by oligothiophene bridges

M. Haryono, M. Kalisz, R. Sibille, R. Lescouëzec, C. Fave, G. Trippe-Allard, Y. Li, M. Seuleiman, H. Rousselière, A. M. Balkhy, J. Lacroix and Y. Journaux, Dalton Trans., 2010, 39, 4751
DOI: 10.1039/C0DT00043D

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