Issue 40, 2006

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

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

Article information

Article type
Paper
Submitted
17 May 2006
Accepted
19 Jun 2006
First published
06 Jul 2006

J. Mater. Chem., 2006,16, 3969-3975

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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