Magnetic relaxation in two 1D Tb-nitronyl nitroxide complexes

Two one-dimensional lanthanide–nitronyl nitroxide compounds have been successfully prepared. The magnetic studies reveal that slow magnetic relaxations were observed for both two Tb complexes. [Display omitted] •Two novel lanthanide-radical complexes.•Both complexes show one-dimensional structures.•...

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Bibliographic Details
Published in:Inorganica Chimica Acta 2018-02, Vol.471, p.608-614
Main Authors: Xiao, Feng-Ping, Hu, Peng, Hao, Xiang-Ying, Cao, Jiang-Fei, Zhu, Li-Li
Format: Article
Language:English
Subjects:
Chemical compounds
Chemical reactions
Crystal structure
Crystallography
Lanthanide
Magnetic induction
Magnetic relaxation
Magnetism
Metal oxides
Nitronyl nitroxide radical
Organic compounds
Single crystals
Single-molecule magnets
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Summary:Two one-dimensional lanthanide–nitronyl nitroxide compounds have been successfully prepared. The magnetic studies reveal that slow magnetic relaxations were observed for both two Tb complexes. [Display omitted] •Two novel lanthanide-radical complexes.•Both complexes show one-dimensional structures.•Slow magnetic relaxations were observed for both complexes. Reaction of the nitronyl nitroxide radical NIT-CH3 and NIT-C3H5 with Tb(hfac)3 affords two one-dimensional lanthanide–nitronyl nitroxide compounds: [TbIII(hfac)3(NIT-CH3)]n (1), and [TbIII(hfac)3(NIT-C3H5)]n (2) (NIT-CH3 = 2,4,4,5,5-pentamethylimidazolyl-1-oxyl-3-oxide; NIT-C3H5 = 2-cyclopropyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide). Single crystal X-ray crystallographic analysis reveals that these two compounds are one-dimensional chains built up by Tb(hfac)3 units bridged by radicals through their NO groups. Magnetic studies show that both Tb complexes exhibit frequency-dependent out-of-phase signals.
ISSN:0020-1693
1873-3255
DOI:10.1016/j.ica.2017.11.026