Síntese e caracterização de losartana com metais bivalentes

• Ano de defesa: 2015
• Autor(a) principal: Teixeira, José Augusto
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Instituto de Ciências Exatas e da Terra (ICET); UFMT CUC - Cuiabá; Programa de Pós-Graduação em Química
• Palavras-chave em Português: Los; Atividade antioxidante; Comportamento térmico; Metais bivalentes; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA; Thermal behaviour; Antioxidante activity; Bivalente metals
• Link de acesso: http://ri.ufmt.br/handle/1/1632

ZnLos2.H2O, MnLos2.4H2O, CoLos2.3H2O, NiLos2.2,5H2O e FeLos2.2,5H2O were obtained in the solid-state. The precipitates were filtered, washed and kept in a Kiln for 24 hours. The materials were characterized by Fourier transform infrared spectroscopy (FTIR), termogravimetry-derivative termogravimetry (TG/DTG), simultaneous termogravimetry-differential scanning calorimetry (TG-DSC), simultaneous termogravimetry-differential scanning calorimetry coupled with Fourier transform infrared spectroscopy (TG/DSC-FTIR), X-ray diffractometry (DRX) and antioxidant activity evaluations with DPPH. The results can be to inform the thermal behaviour, hydration, carbon and hydrogen analysis, stoichiometric relationship, metal-ligand interaction, crystallinity, antioxidant capacity and released gases during of the thermal decomposition of compounds. The theoretical and experimental infrared showed that the metal ion were bonded to the hydroxyl and tetrazol group. The thermal behavior of the compound showed similar thermal behavior in air atmosphere and nitrogen atmosphere. Evolved gases and the crystallinity of compounds observed in the TG/DSC-FTIR and DRX analysis showed unpublished results, as crystallinity of MnLos2.4H2O among the prepared compounds. The gaseous products that evolved during the thermal decomposition of los and prepared compounds were CO, CO2, NH3, CH3NH2, and H2O, CO, CO2 , NH3, CH3NH2, HCN, respectively, being only in a dry air atmosphere was observed the presence of NO for Los. The MnLos2.4H2O and HLos showed 20% greater than the others compounds studied, all compounds tested with DPPH.