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Issue 40, 2006
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Ligand and solvent effects in the nonaqueous synthesis of highly ordered anisotropic tungsten oxide nanostructures

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Abstract

Tungsten oxide nanoparticles were synthesized by a nonaqueous sol–gel process involving the reaction of tungsten chloride either with benzyl alcohol in the presence of various catechol ligands like 4-tert-butylcatechol, pyrocatechol and nordihydroguaiaretic acid or with 4-tert-butylbenzyl alcohol only. Dependent on the reaction system, organic–inorganic hybrid nanostructures with various morphologies were found, including short-range ordered lamellar structures as well as highly organized anisotropic stacks of tungstite nanoplatelets. In the case of 4-tert-butylbenzyl alcohol, the self-organization reaches two hierarchical levels, where the inorganic nanobuilding blocks, just a few Ångstroms in thickness, form nanocolumns perfectly arranged over a length scale of up to 10 microns. Several of these stacks assemble laterally into polydisperse bundles. The structural details as well as a potential formation mechanism are provided by a combination of XRD, TEM, HRTEM, and IR spectroscopy investigations.

Graphical abstract: Ligand and solvent effects in the nonaqueous synthesis of highly ordered anisotropic tungsten oxide nanostructures

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Publication details

The article was received on 17 May 2006, accepted on 19 Jun 2006 and first published on 06 Jul 2006


Article type: Paper
DOI: 10.1039/B607008F
Citation: J. Mater. Chem., 2006,16, 3969-3975
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    Ligand and solvent effects in the nonaqueous synthesis of highly ordered anisotropic tungsten oxide nanostructures

    J. Polleux, M. Antonietti and M. Niederberger, J. Mater. Chem., 2006, 16, 3969
    DOI: 10.1039/B607008F

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