Lanthanide Based Magnetic Molecular Materials

Bingwu Wang, Shangda Jiang, Xiuteng Wang, and Song Gao 

College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, PR. China. Email bwwang pku.edu.cn andgaosong pku.edu.cn 

Rare Earth Coordination Chemistry Fundamentals and Applications Edited by Chunhui Huang 2010 John Wiley Sons (Asia) Pte Ltd. ISBN 978-0-470-82485-6 

I is the spin-orbit coupling constant which ranges from 600 to 3000 cm throughout the lanthanide series, the highest values corresponding to the heaviest lanthanide ions. 

The g-factor of the Zeeman Hamiltonian of a given J multiplet is given by  

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Magnetic Ordering in Lanthanide Based Molecular Materials... 

Thus, so far not many 3D-magnetic ordered lanthanide-based molecular materials have been obtained. However, the existing examples, including the lanthanide-radical systems and lanthanide-transition metals, provide us with much experimental and theoretical knowledge and experience. The research into 3D-magnetic ordered lanthanide-based molecular materials is still an open subject for chemists and physicists. 

The d-f heteronuclear or lanthanide-transition metal (abbreviated as Ln-M) complexes attract interest from both academic and industry because of the challenge for their synthesis, the novelty of their structures, and their potential application as advanced materials, such as molecular or nano magnets,bimetallic catalysts, and sensors. The complexes can be assigned to three categories based on the nature of the Ln-M interaction (a) complexes with direct Ln-M bonding, (b) complexes with Ln-M interactions bridged by ligands, and (c) the complexes with ionically associated Ln-coordination units and M-coordination units. Most of the d-f heteronuclear complexes of carboxylic acids reported so far are found with type (b) structure, and very few of them are of structure type (c). The lanthanides and the transition metals in these complexes are far away from each other, and no direct Ln-M interactions have been observed. 

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