Maryam Ranjbar - Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, P.O. Box ۳۳۵۳۵-۱۱۱, Iran
Mostafa Yousefi - marandjbar@irost.org

In this investigation, a nano-sized La(III) supramolecular compound, [pyda.H]2[La2(pydc)4(H2O)4].2H2O (1), has been synthesized by sonochemical method and characterized by field emission scanning electron microscope (FESEM), X-ray powder diffraction (XRD) and elemental analyses. This method comparing to the other methods is very fast and it does not need high temperatures during the reactions. Lanthanum oxide nanoparticles have been prepared by direct thermaldecomposition of compound 1 nanostructure at 800°C under air atmosphere. The structural characterization by XRD, and morphological observations via FESEM revealed that quasi-spherical La2O3 nanoparticles obtained is well crystallized and are uniform in both morphology and particle size. This study demonstrates that the supramolecular compounds may be suitable precursors for the simple one-pot preparation of nanoscale metal oxide materials with different and interesting morphologies.

Nano-structured materials; Lanthanum oxide; Supramolecular; Sonochemical