Predictable self-assembled [2 × 2] Ln(III)4 square grids (Ln = Dy,Tb)—SMM behaviour in a new lanthanide cluster motif

Muhammad Usman Anwar; Laurence Kenneth Thompson; Louise Nicole Dawe; Fatemah Habib; Muralee Murugesu

doi:10.1039/C2CC17546K

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Predictable self-assembled [2 × 2] Ln(iii)₄ square grids (Ln = Dy,Tb)—SMM behaviour in a new lanthanide cluster motif†

Muhammad Usman Anwar,^a Laurence Kenneth Thompson,*^a Louise Nicole Dawe,^a Fatemah Habib^b and Muralee Murugesu^b

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* Corresponding authors

^a Department of Chemistry, Memorial University, St. John's, NL, Canada
E-mail: lk.thompson@mun.ca
Fax: 01-709-864-3702
Tel: 01-709-864-8750

^b Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Canada

Abstract

The ditopic carbohydrazone ligand (L1) produces the square, self-assembled [2 × 2] grids [Dy₄(L1)₄(OH)₄]Cl₂ (1) and [Ln₄(L1)₄(μ₄–O)(μ₂–1,1–N₃)₄] (Ln = Dy (2), Tb (3)), with 2 exhibiting SMM behaviour. Two relaxation processes occur with U_eff = 51 K, 91 K in the absence of an external field, and one with U_eff = 270 K in the presence of a 1600 Oe optimum field.

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Article information

DOI: https://doi.org/10.1039/C2CC17546K
Article type: Communication
Submitted: 02 Dec 2011
Accepted: 05 Mar 2012
First published: 05 Mar 2012

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Chem. Commun., 2012,48, 4576-4578

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Predictable self-assembled [2 × 2] Ln(III)₄ square grids (Ln = Dy,Tb)—SMM behaviour in a new lanthanide cluster motif

M. U. Anwar, L. K. Thompson, L. N. Dawe, F. Habib and M. Murugesu, Chem. Commun., 2012, 48, 4576 DOI: 10.1039/C2CC17546K

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