| Four metal phthalocyanine tetraboxylic acid complexes (M-PTC) were synthesized and characterized by the IR, UV spectrometry and XRD. The catalytic activity of these complexes was screened using the epoxidation of olefins with molecular oxygen as oxidant. The factors such as reaction solvent, reaction temperature, the amount of solvent, the amount of isobutyradehyde (IBA) and the amount of catalyst were studied. It was found that Fe-PTC was the best catalyst. Under the optimized reaction conditions (ClCH2CH2Cl as the solvent, n(cyclooctene):n(catalyst):n(IBA)=4:0.0025:16,45℃,5h), the epoxidation of cyclooctene can give91.1%yield,91.1%selectivity and1457TON. Fe-PTC could be reused for7times without loss of the catalytic activity. The IR spectra of the fresh catalyst and the recovered catalyst indicated that the structure of the catalyst was almost the same before and after reaction.In the meanwhile, we designed and prepared Fe-containing metal-organic coordination polymers with2,6-pyridinedicarboxylic acid as the ligand. The catalytic activity of the MOCPs was screened using the epoxidation of olefins with molecular oxygen as oxidant. Under the optimized reaction conditions (ACN as the solvent, n(cyclooctene):n(catalyst): n(IBA)=4:0.00025:16,35℃,3h), the epoxidation of cyclooctene can give99.3%conversion,87.7%selectivity and12386.4TON. The IR spectra of the fresh catalyst and the recovered catalyst indicated that the structure of the catalyst was almost the same before and after reaction. |
