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Issue 15, 2019
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Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a DyIII single-ion magnet

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Abstract

The reaction of a tridentate NNO donor ligand, 4-nitro-2-((2-(pyridine-2-yl)hydrazono)methyl)phenol (HL) with lanthanide(III) nitrates in the presence of triethylamine afforded a new family of neutral mononuclear LnIII complexes [Ln(NO3)(L)2(HOCH3)] (Ln = Gd; (1) Tb; (2), Dy; (3), and Ho (4). The mononuclear complexes were structurally characterized by single crystal X-ray diffraction studies which revealed a spherical tricapped trigonal prism geometry with a pseudo D3h symmetry around the LnIII centre. Static (dc) and dynamic (ac) magnetic studies have been performed on these complexes. Field-induced single-ion magnet behaviour was observed in the DyIII analogue with an effective energy barrier and an pre-exponential factor of Δ/kB = 68(2) K and τ0 = 1.8 × 10−7 s, respectively.

Graphical abstract: Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a DyIII single-ion magnet

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Article information


Submitted
01 Feb 2019
Accepted
08 Mar 2019
First published
08 Mar 2019

Dalton Trans., 2019,48, 4857-4866
Article type
Paper

Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a DyIII single-ion magnet

P. Kalita, A. Malakar, J. Goura, S. Nayak, J. M. Herrera, E. Colacio and V. Chandrasekhar, Dalton Trans., 2019, 48, 4857
DOI: 10.1039/C9DT00504H

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