resumo
Crystalline hybrid catalysts based on molybdenum or tungsten oxide and aliphatic diamines were synthesized via simple, eco-friendly reproducible methodologies, starting from commercially available and relatively inexpensive organic and inorganic precursors, and using water as solvent under mild conditions. The crystal structures of the obtained fine powdered solids were solved ab initio from powder X-ray diffraction data. The type of organic component (1,2-diaminoethane, 1,2-diaminopropane, 1,3-diaminopropane) may play a structure-directing role. On the other hand, different metals (M = Mo, W) may lead to isostructural one-dimensional hybrids of the type MO3(L) with the same bidentate diamine ligand L. The prepared catalysts were investigated for the liquid phase oxidation of saturated and unsaturated hydrocarbons (cis-cyclooctene, cyclooctane), using different types of oxidants (O-2, H2O2, tert-butyl hydroperoxide). Differences in catalytic performances associated with distinct structural features were investigated. Graphic
palavras-chave
OLEFIN EPOXIDATION; TUNGSTEN COMPLEXES; TETRACARBONYL COMPLEXES; HYDROTHERMAL SYNTHESIS; CRYSTAL-STRUCTURES; MOLYBDENUM; OXIDATION; PERFORMANCE; BEHAVIOR; ELUCIDATION
categoria
Chemistry
autores
Bozek, B; Neves, P; Oszajca, M; Valente, AA; Poltowicz, J; Pamin, K; Lasocha, W
nossos autores
Anabela Tavares Aguiar Valente
Investigador Principal
Patrícia dos Santos Neves
Investigador AuxiliarGrupos
1 - nanomateriais inorgânicos funcionais e híbridos orgânico-inorgânico
4 - biorrefinarias, materiais de origem biológica e reciclagem
agradecimentos
BiOle_AcidOxCat