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Issue 2, 2008
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Synthesis and behaviour of size controlled cyano-bridged coordination polymer nanoparticles within hybrid mesoporous silica

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Abstract

Size controlled cyano-bridged coordination polymer nanoparticles Mn+/[M′(CN)m]3 (where Mn+ = Ni2+, Fe2+, Co2+ and M′ = Fe3+, Co3+(m = 6); Mo5+ (m = 8)) have been synthesised and organised by using mesostructured hybrid silica hosts of various sizes (3.4, 5.3 and 7.5 nm) containing –(CH2)2C5H4N groups. The obtained composite materials were studied by transmission electronic microscopy (TEM), infrared and electronic spectroscopies, nitrogen sorption, X-ray diffraction and magnetic measurements. These analyses reveal the formation of hetero- or homo-metallic cyano-bridged nanoparticles with controlled stoichiometry uniform in size and shape within the silica matrix. The size of the nanoparticles is controlled by the pore size of the silica used. The magnetic study of these nanocomposite materials reveal an appearance of a spin-glass like regime which can be caused by a spin frustration on the surface of the nanoparticles and/or by interparticle magnetostatic interactions.

Graphical abstract: Synthesis and behaviour of size controlled cyano-bridged coordination polymer nanoparticles within hybrid mesoporous silica

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The article was received on 22 Jun 2007, accepted on 20 Sep 2007 and first published on 12 Nov 2007


Article type: Paper
DOI: 10.1039/B709490F
Citation: New J. Chem., 2008,32, 273-282
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    Synthesis and behaviour of size controlled cyano-bridged coordination polymer nanoparticles within hybrid mesoporous silica

    B. Folch, Y. Guari, J. Larionova, C. Luna, C. Sangregorio, C. Innocenti, A. Caneschi and C. Guérin, New J. Chem., 2008, 32, 273
    DOI: 10.1039/B709490F

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