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Structure and Catalytic Properties of Dinuclear Copper Complex Encapsulated in SAPO－５

GAO Li-juan,JIAO Shuai-bin,GE Chun-hua,TIAN Yong-hua

Abstract （1144）

PDF （369KB）（651）

The dinuclear copper complexe was synthesized and characterized. The macrocyclic copper complexe was immobilized on SAPO-5 molecular sieve, functionalized SAPO-5 molecular sieve by γ-aminopropyl. The sample was characterized by BET, IR and UV-vis spectroscopies, XRD, ICP-AES and TG/DTA techniques,and its structure still remained intact. The catalytic properties of the prepared catalyst were studied by the cyclohexane oxidation with H2O2 as an oxidant. The catalytic results show that the catalyst has the better activity and stability in cyclohexane oxidation. Amongst all the solvents ,cyclohexane conversion is the highest (55.1%) when acetonitrile was used as solvent. The influences of time and temperature on cyclohexane conversion are also further investigated. The considerable reactive condition should be reaction time (10～12 h), reaction temperature (80～90 ℃) respectively.

2009, 22 (3): 55-59. DOI: 10.3696/j.issn.1006-396X.2009.03.014

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Synthesis and Catalytic Properties in Cyclohexane Oxidation of Macrocyclic Heterodinuclear Complexes Encapsulated in MCM-41

GAO Li-juan, LI Rui-feng

Abstract （335）

PDF （885KB）（294）

Nine macrocyclic d-f heterodinuclear complexes ［M1M2L］(NO ₃)(H ₂O)n(M,L stand for metal and ligand) were synthesized. Nine d-f heterodinuclear complexes were immobilized on MCM-41 mesoporous materials to prepare encapsulated catalyst by impregnation. The samples were characterized by using IR and UV-Vis, XRD, ICP-AES and TG/DTA techniques. The results show that the structures of heterodinuclear complexes in MCM-41 are unchanged. The catalytic properties of the prepared catalysts were studied by cyclohexane oxidation. The results show that they have better activity in cyclohexane oxidation; TOF values of these encapsulated catalysts are in the range of 20.4~49.2 h-1; the conversion of cyclohexane is the highest (72.1%) when acetic acid is used as solvent. The influence of time, temperature and the amounts of the oxidant and catalyst on cyclohexane oxidation was also investigated. The best reactive conditions are reaction time of 10~12 h, reaction temperature of 343~393 K, H2O2 amount of 5~15 mL and catalyst content of 0.5~1.0 g respectively.

2007, 20 (1): 42-47.