Hidroxo-sais lamelares de composição Cu 2 (OH) 3 X (X = NO 3 , CH 3 COO e ClO 4 ) foram sintetizados através da coprecipitação (sais básicos de nitrato e acetato) e da troca iônica (sal básico de perclorato). Os sólidos cristalinos foram caracterizados por difratometria de raios X, análise termogravimétrica e espectroscopia vibracional. Bandas fracas em 336 e 345 cm (espectro Raman) dos sais de...

Novel heterometallic three-dimensional coordination polymers {[CuII2LnIIICl2(HIA)4(NO3)(DMF)2]∙(2DMF)∙(H2O)}n based on Ce (1), Eu (2) or Gd (3) and imidazole-4-acrylic acid (H2IA), were successfully synthesized using the sonochemical method. All attempts to obtain compound other synthetic methods unsuccessful. The are isostructural, crystallizing in chiral P3221 trigonal space group. crystal st...

Precatalyst control: [CuII(OTf)2(pyb)2]2 CH3CN (1), in which pyb is 1-(2-pyridyl)benzotriazole, enables the synthesis of a wide range propargylamines by A3 coupling reaction at room temperature absence additives. The hybrid N,N?-bidentate ligand imposes exclusive trans coordination Cu, can rotate and modulate charge distribution flux, thus orchestrating structural electronic precatalyst control...

In this study, the extraction and characterization of aquatic humic substances (AHS) from two blackwater rivers in Amazon basin was carried out order to assess seasonal effects AHS structure. addition, an investigation complexing capacities (CC) structures containing metal ions CdII, NiII PbII also done. The (of AHS) done using UV-Vis, molecular fluorescence, infrared spectroscopy. Negro River ...