New nano-particle La(III) supramolecular compound as a precursor for preparation of lanthanum oxybromide-, hydroxide-, and oxide-nanostructures |
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Abstract: | Nano-particles of a new La(III) supramolecular compound La(4,4′-bipy)(H2O)2(NO3)3.75Br0.25] · (4,4′-Hbipy) (1), have been synthesized from reaction of 4,4′-bipy with La(NO3)3 and NaBr by the sonochemical method. For the first time LaOBr, La(OH)3 and La2O3 nano-structures were prepared from La(4,4′-bipy)(H2O)2(NO3)3.75Br0.25] · (4,4′-Hbipy) (1) by calcination at 400, 500, and 700°C, respectively. The structure of 1 was determined by X-ray crystallography and the nano-structures were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). Thermal stabilities of nano and crystal samples of 1 were studied and compared with each other. |
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Keywords: | Supramolecular Lanthanum oxybromide Lanthanum hydroxide Lanthanum oxide Nanoparticle |
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