Issue 39, 2012
From the journal:

Dalton Transactions

Ligand substitution effect on single-molecule magnet behavior in dinuclear dysprosium complexes with radical functionalized phenol as bridging ligands†

Ruina Liu,a   Congming Zhang,a   Licun Li,*a   Daizheng Liaoa  and  Jean-Pascal Sutter*bc  

* Corresponding authors

a Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University, Tianjin 300071, China
E-mail: llicun@nankai.edu.cn

b CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, F-31077 Toulouse, France
E-mail: sutter@lcc-toulouse.fr

c Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse, France

Abstract

Reaction of Dy(hfac)3·2H2O (hfac = hexafluoroacetyl acetonate) with 2-(2-hydroxyphenyl)nitronyl nitroxide (NITPhOH) and 2-(5-bromo-2-hydroxyphenyl)nitronyl nitroxide (NIT5BrPhOH) yielded [Dy2(hfac)4(NITPhO)2] 1 and [Dy2(hfac)4(NIT5BrPhO)2] 2, respectively. These compounds are phenoxo-O bridged binuclear complexes with the radical unit of a ligand coordinated to a single Dy. The Ln centers exhibit a heptacoordinated environment. Despite having very similar structures, these compounds exhibit distinct magnetic behaviors. Compound 1 shows slow relaxation of its magnetization indicating single-molecule magnet behavior, while no frequency-dependent out-of-phase signals were found for complex 2. This difference is likely to result from electronic effects induced by halogen substitution.

Graphical abstract: Ligand substitution effect on single-molecule magnet behavior in dinuclear dysprosium complexes with radical functionalized phenol as bridging ligands

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Article information

DOI
https://doi.org/10.1039/C2DT31310C
Article type
Paper
Submitted
12 Mar 2012
Accepted
14 Aug 2012
First published
14 Aug 2012

Dalton Trans., 2012,41, 12139-12144

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Ligand substitution effect on single-molecule magnet behavior in dinuclear dysprosium complexes with radical functionalized phenol as bridging ligands

R. Liu, C. Zhang, L. Li, D. Liao and J. Sutter, Dalton Trans., 2012, 41, 12139 DOI: 10.1039/C2DT31310C

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