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    Investigation of the Photophysical Properties of a Eu3+ Coordination Polymer Bearing an α-Nitrile Substituted β-Diketonate Ligand via Emission and Ultrafast Transient Absorption Spectroscopy

    231179_231179.pdf (788.9Kb)
    Access Status
    Open access
    Authors
    Reid, B.
    Moore, E.
    Skelton, B.
    Ogden, Mark
    Massi, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Reid, B. and Moore, E. and Skelton, B. and Ogden, M. and Massi, M. 2015. Investigation of the Photophysical Properties of a Eu3+ Coordination Polymer Bearing an α-Nitrile Substituted β-Diketonate Ligand via Emission and Ultrafast Transient Absorption Spectroscopy. Australian Journal of Chemistry. 68 (9): pp. 1392-1398.
    Source Title
    Australian Journal of Chemistry
    DOI
    10.1071/CH15253
    ISSN
    0004-9425
    School
    Department of Chemistry
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT130100033
    URI
    http://hdl.handle.net/20.500.11937/31332
    Collection
    • Curtin Research Publications
    Abstract

    Reaction of the β-diketone ligand, 2-cyano-1,3-phenyl-1,3-propandione (LH), with hydrated EuCl3 in the presence of 1,10-phenanthroline (Phen), results in the crystallisation of a one-dimensional Eu3+ coordination polymer of formulation [Eu(Phen)(L)3]∞, formed by coordination of the nitrile group of an O,O′-bound ligand to a neighbouring metal centre. An investigation of the metal-centred emission of the polymer, both in the solid state and solution, revealed red emission characterised by relatively long-lived excited state lifetimes and high intrinsic quantum yields. However, analysis of the overall quantum yield and sensitisation efficiency reveals that ultrafast processes in the ligand potentially inhibit Eu3+ sensitisation. Further investigations into these processes using transient absorption spectroscopy suggest that substitution at the α-C position may significantly decrease sensitisation via the antenna effect.

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