Synthesis, Structures, and Magnetic Properties of Three Fluoride-Bridged Lanthanide Compounds: Effect of Bridging Fluoride Ions on Magnetic Behaviors

A family of fluoride-bridged lanthanide compounds, [DyIIIF­(oda)­(H2O)3] (1, oda = oxidiacetate) and [LnIII 2F2(oda)2(H2O)2] (Ln = Tb­(2) and Dy­(3)), was synthesized and characterized. To investigate the effects of bridging ligands on magnetic behaviors, two hydroxyl-bridged complexes of formulas [...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic chemistry 2012-07, Vol.51 (14), p.7529-7536
Main Authors: Zhou, Qi, Yang, Fen, Liu, Dan, Peng, Yu, Li, Guanghua, Shi, Zhan, Feng, Shouhua
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A family of fluoride-bridged lanthanide compounds, [DyIIIF­(oda)­(H2O)3] (1, oda = oxidiacetate) and [LnIII 2F2(oda)2(H2O)2] (Ln = Tb­(2) and Dy­(3)), was synthesized and characterized. To investigate the effects of bridging ligands on magnetic behaviors, two hydroxyl-bridged complexes of formulas [LnIII 2(OH)2(oda)2(H2O)4] (Ln = Tb­(4) and Dy­(5)) were also synthesized. Magnetic measurements show that the magnetic behaviors of the compounds are obviously distinct. Compounds 1, 2, and 3 show ferromagnetic interactions, while only antiferromagnetic interactions are observed in compounds 4 and 5. Among these compounds, 1 and 3 show frequency-dependent ac-susceptibility indicative of slow magnetic relaxation. Because the structures of Dy2 cores are very similar in compounds 3 and 5, it may be inferred that the differences of bridging ligands are mainly responsible for the distinct magnetic exchange interactions and relaxation dynamics.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic300125y