Green Catalytic Materials:The Study On Synthesis And The Catalytic Activity In Cyclohexane Oxidation Of Vanadium Complexes

The cyclohexane?Cy?oxidation has been widely investigated to obtain the main products of cyclohexanol?CyOH?and cyclohexanone?CyO?in catalytic chemistry.They are important reagents to produce adipic acid and caprolactam,which were further used for the manufacture of nylon.However,there are some problems in the conventional process of Cy oxidation,such as much by-products,low selectivity and environmental pollution.To achieve a good activity,the search for more active catalysts under mild conditions has been devoted.In this thesis,[VO?O₂??bpz*eaT?·VO?C₄H₄O₆?]·H₂O?1?,[VOSO₄?bpz*eaT?]·C₆H₈O₇?2?,[VO(C₁₂H₈N₂)?C₉H₇NO₃?]·CH₃OH·0.5H₂O?3?,[VOSO₄?bpz*eaT?]·C₄H₄O₄?4?and[VOSO₄?bpz*eaT?]·0.5(C₁₀H₁₆O₄)?5?were synthesized.The structures of these complexes were characterized by single-crystal X-ray diffraction,elemental analysis and IR spectroscopy.In addition,the complexes 1-3 were also characterized by UV spectroscopy.To seek the active catalysts for Cy oxidation,starting materials and all complexes were applied for homogeneous oxidation with H₂O₂ as oxidant and the effects of various factors such as amount of H₂O₂,HNO₃,H₂O,Cy and solvent,as well as the kind of additives and the amount of additives were evaluated.Reaction mechanisms were also supposed primarily.