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- W2783409746 abstract "Three dinuclear coordination compounds, [Ln2(Hhms)2(NO3)4]·MeCN [Ln = Dy (1) and Er (2)] and [Dy2(Hhms)2(NO3)2(H2O)3]·(NO3)2·MeCN·(H2O)2 (3), have been isolated bearing the asymmetric Schiff-base ligand 1-(2-hydroxy-3-methoxybenzylidene)semicarbazide (H2hms). The potentially tetradentate ONOO-donor ligand shows considerable metal-ion-selective phenoxo bridging in 1–3. Compounds 1 and 2 display a hula-hoop-like coordination geometry, whereas this geometry is broken by an additional µ2-OH2 bridge in compound 3. The structural discrepancies induced by the different bridging modes in 1 and 3 affect the magnetism. Compound 1 exhibits slow relaxation of the magnetization, which suggests single-molecule magnet (SMM) behavior, whereas no out-of-phase alternating-current signal was observed for 3. Meanwhile, compared with a previously reported Dy2 compound, compound 1 has the same coordination sphere but exhibits different magnetic properties, which has been attributed to differences in the ligand backbone. Fine-tuning of the ligand field is dominated by µ-O bridges and by the extent of conjugation in the backbone of the ligand, which affects the SMM/non-SMM behavior." @default.
- W2783409746 created "2018-01-26" @default.
- W2783409746 creator A5008856171 @default.
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- W2783409746 date "2016-12-23" @default.
- W2783409746 modified "2023-10-15" @default.
- W2783409746 title "Fine‐Tuning Ligand Fields with Schiff‐Base Ligands in Dy <sub>2</sub> Compounds" @default.
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- W2783409746 doi "https://doi.org/10.1002/ejic.201601188" @default.
- W2783409746 hasPublicationYear "2016" @default.
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