Products Cited in Publications Worldwide Field-induced slow-magnetic relaxation behaviours of Dy (III) ions in Dy2 dimeric complexes

Field-induced slow-magnetic relaxation behaviours of Dy (III) ions in Dy2 dimeric complexes

Ahmed, Naushad; Nabi, Rizwan; Zhang, Xiaoguang; Darensbourg, Donald J

DOI:

Abstract

A series of dimeric Dy2 complexes 1–3 was constructed using the 2,6-diacetylpyridine bis-salicyl hydrazone ligand system LN3O2 (provides equatorial N3O2 donor atoms) and linkers derived from hydrazine and vanillin (L1) or 4-hydroxybenzaldehyde (L2). These linkers coordinate from one of the axial sites of Dy(III) ions, and the other axial sites can be occupied by water or triphenylphosphine oxide (TPPO). Single crystal X-ray diffraction data reveal the molecular formulae of [Dy2 (H2LN3O2)2(L1)(H2O)2], [Dy2(H2LN3O2)2(L1)(TPPO)2], [Dy2(H2LN3O2)2(L2)(PPh3O)2], respectively, for complexes 1–3. The field-induced slow-magnetic relaxation behavior was observed for all these complexes, with Orbach Ueff = 11 cm−1 (T0 = 2.0 × 10−5 s−1), Ueff = 12.5 cm−1 (T0 = 7.9 × 10−6 s−1) and Ueff = 7.65 cm−1 (T0 = 9 × 10−5 s−1) and dominating Raman magnetic relaxation processes. Ab initio theoretical studies were performed on the optimized X-ray structures of these complexes to rationalize the experimental observations.

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A1062591129-30-297%

2,6-Diacetylpyridine

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A213806936-02-797% HPLC

2-Hydroxybenzohydrazide

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