First examples of polynuclear lanthanide diethylene glycol based coordination clusters

Peng, Guo, Zhang, Ying-Ying, Li, Zhao-Yang and Kostakis, George E (2017) First examples of polynuclear lanthanide diethylene glycol based coordination clusters. European Journal of Inorganic Chemistry, 2017 (20). pp. 2700-2706. ISSN 1434-1948

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Abstract

Five lanthanide coordination clusters (CCs) [Ln7(μ3-OH)4(deg)2(Hdeg)2(ben)11]·xCH3CN [Ln=Eu (1), Gd (2), Tb (3), Dy (4), Ho (5); H2deg=diethylene glycol, Hben=benzoic acid, x=7 for 1-4 and 6 for 5] with diethylene glycol and benzoic acid as ligands have been prepared and structurally characterized. All CCs consist of a heptanuclear lanthanide core with a scarce tip-sharing double-butterfly topology. Magnetic measurements revealed that CC 4 exhibits slow magnetic relaxation with an energy barrier of about 6K, whereas CC 3 shows outstanding magnetocaloric effect with entropy change of 34.6 J Kg-1 K-1 at 2K and ΔH=7T. The photoluminescent properties of CCs 1, 3 and 4 were also investigated, displaying intense characteristic emission spectra of EuIII, TbIII and DyIII ions.

Item Type: Article
Keywords: Coordination cluster,Diethylene glycol,Lanthanide,Magnetic relaxation,Magnetocaloric effect
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Georgios Kostakis
Date Deposited: 30 Mar 2017 10:33
Last Modified: 14 Jun 2017 10:20
URI: http://sro.sussex.ac.uk/id/eprint/67223

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