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    Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties

    Access Status
    Fulltext not available
    Authors
    Andrews, P.
    Beck, T.
    Fraser, B.
    Junk, P.
    Massi, Massimiliano
    Moubaraki, B.
    Murray, K.
    Silberstein, M.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Andrews, Philip C. and Beck, Tobias and Fraser, Benjamin H. and Junk, Peter C. and Massi, Massimiliano and Moubaraki, Boujemaa and Murray, Keith S. and Silberstein, Morry. 2009. Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties. Polyhedron. 28 (11): pp. 2123-2130.
    Source Title
    Polyhedron
    DOI
    10.1016/j.poly.2009.03.031
    ISSN
    02775387
    Faculty
    Department of Applied Chemistry
    School of Science and Computing
    Faculty of Science and Engineering
    Remarks

    The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/218/description#description. Copyright © 2009 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/11219
    Collection
    • Curtin Research Publications
    Abstract

    The controlled hydrolysis of lanthanoid trichloride hexahydrate (Ln = Nd, Eu, Ho) in methanol with the beta-diketone ligands dibenzoylmethane and 1,3-bis(4-ethoxyphenyl)propane-1,3-dione yielded tetranuclear and pentanuclear hydroxo clusters for Eu and Ho. In contrast, performing the reaction in the presence of 1,3-bis(4-methoxyphenyl)propane-1,3-dione yielded a mononuclear complex for Nd. The compounds were structurally characterised by means of single crystal X-ray diffraction, showing that the increased bulkiness of the ligand due to the ethoxy functionalities does not affect the capability of the diketonate to stabilize the cluster core. Variable temperature dc susceptibility magnetic measurements were made on the Clusters and were indicative of very weak to zero antiferromagnetic, intra-cluster Coupling. Variable frequency ac data recorded at low temperatures did not show any evidence for single molecule magnet (SMM) behaviour. unlike the recent reported case of the analogue [Dy-5(OH)(5)(Ph(2)acac)(10)], where Ph(2)acac(-) is the dibenzoylmethanide ligand.

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