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Issue 10, 2011
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Synthesis of spin crossover nano-objects with different morphologies and properties

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Abstract

Nanoparticles of the spin crossover complex [Fe(NH2trz)3](tosylate)2 (tosylate = p-toluene sulfonate anion) were synthesized and dispersed in a non-ionic surfactant through a microemulsion-based method. Dynamic light scattering and transmission electronic microscopy was used to determine the mean sizes of the particles, which can be tuned from 3–4 nm to 40 nm depending on the synthetic conditions. The thermal spin crossover behavior remains cooperative and appears only weekly dependent on the particle size within this size range. The thermal treatment of the colloidal suspensions leads to the transformation of the particles into fibrous structures. On the other hand, the destabilization of the microemulsions by an adequate solvent leads to a powder with larger particles, which display properties similar to the bulk material.

Graphical abstract: Synthesis of spin crossover nano-objects with different morphologies and properties

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Publication details

The article was received on 08 Mar 2011, accepted on 12 Apr 2011 and first published on 25 May 2011


Article type: Paper
DOI: 10.1039/C1NJ20218A
Citation: New J. Chem., 2011,35, 2081-2088
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    Synthesis of spin crossover nano-objects with different morphologies and properties

    A. Tokarev, L. Salmon, Y. Guari, G. Molnár and A. Bousseksou, New J. Chem., 2011, 35, 2081
    DOI: 10.1039/C1NJ20218A

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