A new nano-sized La(III) supramolecular compound, [pyda.H]2[La2(pydc)4(H2O)4]·2H2O (1), where [pyda.H]+ = 2,6-diaminopyridinium, and [pydc]2− = 2,6-pyridinedicarboxylate, was synthesized by the sonochemical method and characterized by field emission scanning electron microscope (FESEM), X-ray powder diffraction (XRD) and elemental analyses. Lanthanum oxide nanoparticles were prepared by direct thermal decomposition of 1 nanostructures in a programmable furnace up to 800 °C in ambient atmosphere. The structural characterization was performed by powder XRD; and, morphological observations by FESEM revealed that the quasi-spherical La2O3 nanoparticles obtained are well crystallized and uniform in both morphology and particle size. The study demonstrates that supramolecular compounds may be suitable precursors for the simple one-pot preparation of nanoscale metal oxide materials with different morphologies.
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Authors are grateful to Iranian national science foundation (INSF) and Iranian Research Organization for Science and Technology (IROST) and Nanotechnology Initiative Council for their unending effort to provide financial support to undertake this work.
M.S. Yazdan Parast, A. Morsali, J. Inorg. Organomet. Polym. 21, 365–368 (2011)Google Scholar