Issue 41, 2013
From the journal:

Dalton Transactions

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

Ming Fang,ab   Hanhua Zhao,a   Andrey V. Prosvirin,a   Dawid Pinkowicz,ac   Bin Zhao,*b   Peng Cheng,b   Wolfgang Wernsdorfer,d   Euan K. Brechin*e  and  Kim R. Dunbar*a  

* Corresponding authors

a Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
E-mail: dunbar@mail.chem.tamu.edu

b Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin 300071, P. R. China
E-mail: zhaobin@nankai.edu.cn

c Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland

d Institut Néel, CNRS and Université Joseph Fournier, BP 166, 25 Avenue des Martyrs, 38042 Grenoble Cedex 9, France

e EaStCHEM School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh, Scotland, UK
E-mail: ebrechin@staffmail.ed.ac.uk

Abstract

A series of isostructural octanuclear lanthanide complexes of general formula [Ln8(sao)4(μ3-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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Article information

DOI
https://doi.org/10.1039/C3DT51727F
Article type
Paper
Submitted
27 Jun 2013
Accepted
30 Jul 2013
First published
01 Aug 2013

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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