Multifunctional hybrid materials based on transparent poly(methyl methacrylate) reinforced by lanthanoid hydroxo clusters

Andrews, Philip C., Brown, David H., Fraser, Benjamin H., Gorham, Nicole T., Junk, Peter C., Massi, Massimiliano, St Pierre, Timothy G., Skelton, Brian W., and Woodward, Robert C. (2010) Multifunctional hybrid materials based on transparent poly(methyl methacrylate) reinforced by lanthanoid hydroxo clusters. Dalton Transactions, 39 (46). pp. 11227-11234.

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Three pentanuclear lanthanoid hydroxo clusters of composition [Ln(OH)5(abzm)10], where Ln = Eu, Tb, Ho and abzm = di(4-allyloxy)benzoylmethanide, have been prepared. The structures have been characterised by means of IR, Raman, elemental analyses and X-ray diffraction, showing a pyramidal square-based cluster core. The clusters (Tb and Ho) exhibit Curie–Weiss Law behaviour, displaying antiferromagnetic ordering at low temperatures. The emission properties of the Eu cluster demonstrate the abzm− ligand is an efficient antenna (λex = 420 nm) only for the sensitisation of Eu luminescence in the visible range, via energy transfer to the 5D0 state of the trivalent metal. The clusters have been reacted in the presence of methyl methacrylate and azobisisobutyronitrile to prepare reinforced polymers via radical polymerisation. The obtained materials exhibit swelling upon immersion into organic solvents up to ≈ 110% of their original size, in agreement with the presence of cluster-crosslinked polymeric chains. Also, no loss of transparency was observed in the preparation of the materials. The characteristic red emission of the Eu cluster in also retained in the polymeric material.

Item ID: 29669
Item Type: Article (Research - C1)
ISSN: 1477-9234
Keywords: in-situ polymerization; light-emitting-diodes; structural-characterization; ph-conditions; complexes; polymers; coordination; nanocomposites; tetranuclear; polystyrene
Funders: Australian Research Council (ARC), Curtin University of Technology
Projects and Grants: ARC (DP0985481)
Date Deposited: 02 Oct 2013 10:34
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030202 f-Block Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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