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Issue 41, 2013
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Squaring the cube: a family of octametallic lanthanide complexes including a Dy8 single-molecule magnet

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Abstract

A series of isostructural octanuclear lanthanide complexes of general formula [Ln8(sao)43-OH)4(NO3)12(DMF)12] (Ln = Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), Dy (6), Ho (7), Er (8); DMF = dimethylformamide) have been prepared via reactions of salicylaldoxime (saoH2), tetramethylammonium hydroxide (Me4NOH) with the appropriate lanthanide nitrate salt (Ln(NO3)3·6H2O). The metallic skeletons of the complexes describe [Ln4] tetrahedra encapsulated inside a [Ln4] square with the inner core stabilised through μ3-OH ions and the periphery by μ4-sao2− ligands. The magnetic properties of compounds 2–8 were investigated by dc and ac magnetometry. Temperature dependent ac magnetic susceptibility data reveal that the dysprosium analogue (6) displays an out-of-phase signal in the absence of an applied magnetic field indicative of slow relaxation of the magnetization typical of a Single-Molecule Magnet (SMM). Micro-SQUID measurements reveal temperature and sweep rate dependent hysteresis below 1.0 K.

Graphical abstract: Squaring the cube: a family of octametallic lanthanide complexes including a Dy8 single-molecule magnet

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Publication details

The article was received on 27 Jun 2013, accepted on 30 Jul 2013 and first published on 01 Aug 2013


Article type: Paper
DOI: 10.1039/C3DT51727F
Citation: Dalton Trans., 2013,42, 14693-14701
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    Squaring the cube: a family of octametallic lanthanide complexes including a Dy8 single-molecule magnet

    M. Fang, H. Zhao, A. V. Prosvirin, D. Pinkowicz, B. Zhao, P. Cheng, W. Wernsdorfer, E. K. Brechin and K. R. Dunbar, Dalton Trans., 2013, 42, 14693
    DOI: 10.1039/C3DT51727F

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