【摘要】 合成了3种同双核金属配合物[M2LCl3]Cl(L代表配体三亚乙基四胺,M代表Co,Cu,Cr),采用微波加热法合成了SBA-15分子筛,采用浸渍法将3种同双核金属配合物分别固载在表面官能化的SBA-15分子筛(SBA-15-NH2分子筛)中制得负载型催化剂。傅里叶变换红外光谱、X射线衍射、紫外可见光谱和热分析表征结果表明,同双核金属配合物被固载后,其结构仍保持完整。以环己烷氧化反应为探针反应,考察了[Co2LCl3]Cl/SBA-15-NH2,[Cu2LCl3]Cl/SBA-15-NH2,[Cr2LCl3]Cl/SBA-15-NH2催化剂的活性,环己烷转化率分别为11.0%,49.5%,57.9%;对于[Cr2LCl3]Cl/SBA-15-NH2催化剂,当分别以乙睛、丙酮和冰醋酸为溶剂时,环己烷转化率分别为57.9%,52.1%,34.2%,3次重复实验的环己烷转化率分别为57.9%,47.8%,46.5%,表明该催化剂具有较好的活性和重复使用性。更多还原

【Abstract】 Three homodinuclear metal complexes[M₂LCl₃]Cl（L stands for triethylenetetramine ligand,and M stands for Co,Cu or Cr）were synthesized,and SBA-15 molecular sieve was prepared by microwave heating method and were functionalized by γ-aminopropyl to produce SBA-15-NH₂ molecular sieve.The homodinuclear metal complexes were then immobilized on SBA-15-NH₂ by impregnation and used as catalysts for cyclohexane oxidation.The samples were characterized by means of FTIR,UV-Vis,XRD and TG-DTA.Structure of homodinuclear metal complexes remains unchanged after being immobilized.Catalytic activities of[Co₂LCl₃]Cl/SBA-15-NH₂,[Cu₂LCl₃]Cl/SBA-15-NH₂ and[Cr₂LCl₃]Cl/SBA-15-NH₂ were studied by cyclohexane oxidation with H₂O₂ as oxidant.When[Cr₂LCl₃]Cl/SBA-15-NH₂ is used as catalyst and acetonitrile as solvent,cyclohexane conversions can reach 57.9%.After being used for three times,activity of[Cr₂LCl₃]Cl/SBA-15-NH₂ catalyst can still keep at 46.5%.更多还原