Search Results - "Araújo Melo, D.M."

Preparation and characterization of lanthanum palygorskite clays as acid catalysts by Araújo Melo, D.M, Ruiz, J.A.C, Melo, M.A.F, Sobrinho, E.V, Martinelli, A.E

“…Palygorskite clays containing 2, 4, 6 or 10% lanthanum (w/w) were prepared by ion-exchange from acid-leached natural clays. Samples were characterized by…”
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WITHDRAWN: Compounds of the rare earth trifluoromethanesulfonates with bis(pentamethylene)urea: synthesis, characterization and thermal stability by Batista, M.K.S., Marinho, E.P., Araújo Melo, D.M., Vicentini, G., Zinner, L.B., Zinner, K.

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Complexes of lanthanide picrates with 1,4-pyrazine-dioxide by Cardoso, M.C.C, Zinner, L.B, Zukerman-Schpector, J, Araújo Melo, D.M, Vicentini, G

“…Complexes of hydrated lanthanide picrates with composition: [Ln 2(pic) 2(pyzDO)(H 2O) 12](pic) 4 (pyzDO) 2(H 2O) 4 (Ln=Pr, Nd, Sm, Eu; pic=picrate;…”
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Spectroscopic, TG and DSC studies of lanthanide picrate complexes with 1,4-pyrazine-dioxide (pyzDO): crystal structure of the terbium complex by Cardoso, M.C.C, Araújo Melo, D.M, Zukerman-Schpector, J, Zinner, L.B, Vicentini, G

“…Terbium(III), holmium(III) and erbium(III) picrate (pic) complexes with pyzDO with composition: [Ln(pic) (pyzDO) (H 2O) 6](pic) 2(pyzDO)(H 2O), were prepared…”
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Addition compounds between 4-methylmorpholine- N-oxide (MMNO) and some lanthanides (III) and yttrium (III) nitrates by Bezerra, R.F, Araújo Melo, D.M, Vicentini, G, Zinner, K, Zinner, L.B

“…The compounds show a general formula Ln(NO 3) 3·3MMNO. They are hygroscopic and present similar colour patterns to those of the respective lanthanides, but…”
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Hydrated neodymium(III) and europium(III) picrate complexes with pyrazine- N-oxide by Marinho, E.P, Araújo Melo, D.M, Zinner, L.B, Vicentini, G, Zukerman-Schpector, J, Zinner, K

“…Compounds with composition Ln(pic) 3·2pyzNO·7H 2O (Ln=Nd, Eu; pic=picrate; pyzNO=pyrazine- N-oxide) were obtained by reaction of the hydrated lanthanide…”
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Kinetic study of the coordination compounds [M(DMA)3(H2O)6](CF3SO3)3, where M=Ce3+, Tb3+ and Lu3 by Araújo Melo, D.M., da Silva, H.E.B, Zinner, L.B., de Oliveira, O.A.

“…The study of the decomposition of coordination compounds by thermogravimetric (TG) and derivative thermogravimetric (DTG) techniques and the determination of…”
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Synthesis and characterization of neodymium nickelate powder produced from polymeric precursors by Fernandes, J.D.G, Araújo Melo, D.M, Zinner, L.B, Salustiano, C.M, Silva, Z.R, Alves Júnior, C, da Costa, J.A.P, Longo, E

“…Nanostructured materials with perovskite structure have been extensively studied in the last few years due to their potential for a variety of applications. In…”
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Synthesis, characterization and structure of lanthanide nitrate complexes with 2-azacyclononanone (AZA) by de Souza, H.K.S, Araújo Melo, D.M, Gomes Fernandes, J.D, Zinner, K, Zinner, L.B, Zukerman-Schpector, J, Vicentini, G

“…Complexes with composition [Ln(NO 3) 3(AZA) 3] (Ln=Nd, Eu, Gd, Tb, Ho and Er) were synthesized and characterized by CHN elemental analyses and lanthanide…”
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Kinetic study of the thermal decomposition of the compound of terbium(III) trifluoromethanesulfonate and hexamethylphosphoramide (HMPA) employing both Zsakó’s and nonlinear methods by Pedrosa, M.F.F, Araújo Melo, D.M, Scatena, H, Borges, F.M.M, Zinner, L.B, Silva, A.O

“…Terbium trifluoromethanesulfonate compound with hexamethylphosphoramide was synthesized and characterized. Thermogravimetric data with three heating rates were…”
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Dehydration and decomposition kinetics of complexes of some rare earth (La, Nd, Dy and Eu) picrates and 2,2′-dithiobis (pyridine-N-oxide) by Marinho, E.P, Borges, F.M.M, Araújo Melo, D.M, Scatena, H, Zinner, L.B, Zinner, K

“…The dehydration and decomposition behavior of some rare earth complexes is analyzed under a kinetic point of view. The experimental data were obtained…”
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Neodymium(III) and europium(III) picrate complexes with 2-azacyclononanone: spectroscopy and structure by Pinto Marinho, E., Araújo Melo, D.M., Zinner, L.B., Zinner, K., Castellano, E.E., Zukerman Schpector, J., Isolani, P.C., Vicentini, G.

“…Complexes with composition Ln(pic) 3·3(aza) (Ln = Nd, Eu; pic = picrate; aza = 2-azacyclononanone) were characterized by IR absorption spectroscopy and…”
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Compounds of lanthanide picrates and 2-azacyclononanone (aza): synthesis, characterization and thermal study by Marinho, E.P, Araújo Melo, D.M, Zinner, L.B, Zinner, K, Xavier de Matos, J.E

“…Addition compounds between lanthanide(III) picrates and azacyclononanone(aza) were characterized by spectroscopic, microanalytical and X-ray data, with special…”
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Evaluation of the relative acid strength of copper supported in γ-alumina by TG and DSC by Araújo Melo, D.M, Carvalho de Sousa, W.S, Zinner, L.B, Freitas Melo, M.A, da Silva, H.E.B, Gouveia Souza, A

“…The relative acid strength of copper was evaluated by thermogravimetry (TG) and differential scanning calorimetry (DSC) methods, using n-butylamine as a…”
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Calorimetric study of the reaction between lanthanoid trifluoromethanesulphonates and hexamethylphosphoramide (HMPA) in ethanolic solution by Araújo Melo, D.M., da Silva, Z.R., Fernandes, J.D.G., dos Santos, C.P.F., da Silva, H.E.B., Zinner, L.B.

“…Compounds between trifluoromethanesulphonates and HMPA were prepared by reaction of the salt and ligand dissolved in ethanol and acetone, respectively, on…”
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Structural characterization of [Ln(TFA) 3(HMPA) 3] (Ln=La, Nd, Er) complexes by Bombieri, G., Benetollo, F., Del Pra, A., da Silva Oliveira, V., Araujo Melo, D.M., Zinner, L.B., Vicentini, G.

“…The X-ray data on La, Nd, Er complexes ([Ln(TFA) 3(HMPA) 3]) show that they crystallize in different forms depending on the solvent content. Er is six and…”
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