Issue 11, 2013

Dinuclear lanthanide complexes bridged by nitronyl nitroxide radical ligands with 2-phenolate groups: structure and magnetic properties

Abstract

Three novel binuclear lanthanide–radical complexes [Ln2(acac)4(NITPhO)2] (Ln(III) = Gd 1, Eu 2, Dy 3; acac = acetylacetonato and NITPhOH = 2-(2′-hydroxyphenyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) have been achieved. These compounds possess dinuclear structure in which two radical ligands link two lanthanide ions through their phenoxo-O atoms. Magnetic studies show that the Gd(III) ion interacts ferromagnetically with the directly bonding NO group while magnetic interaction between two lanthanide ions through two phenoxo groups is antiferromagnetic. No frequency-dependent out-of-phase signals were found for the Dy complex, which shows that the ligand field around the metal center plays a crucial role in modulating the magnetic relaxation of lanthanide compounds.

Graphical abstract: Dinuclear lanthanide complexes bridged by nitronyl nitroxide radical ligands with 2-phenolate groups: structure and magnetic properties

Supplementary files

Article information

Article type
Paper
Submitted
05 Jul 2013
Accepted
14 Aug 2013
First published
02 Sep 2013

New J. Chem., 2013,37, 3620-3626

Dinuclear lanthanide complexes bridged by nitronyl nitroxide radical ligands with 2-phenolate groups: structure and magnetic properties

X. Mei, X. Wang, J. Wang, Y. Ma, L. Li and D. Liao, New J. Chem., 2013, 37, 3620 DOI: 10.1039/C3NJ00739A

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