期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 -, 期 15, 页码 2768-2776出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201201517
关键词
Electrochemistry; Heterogeneous catalysis; Oxidation; Zeolites; Manganese; Alkenes
资金
- Fundacao do Ministerio de Ciencia e Tecnologia (FCT)
- Fundo Europeu de Desenvolvimento Regional (FEDER) [COMPETE-QREN-EU] [PEst-C/QUI/UI0686/2011 (FCOMP-01-0124-FEDER-022716)]
- FCT
The manganese(III) complex with a Schiff-base salen-type ligand (1,5-bis{[(1E)-(2-hydroxyphenyl)methylene]amino}-1H-imidazole-4-carbonitrile) has been encapsulated in the nanopores of a Y zeolite by using two different methodologies, the flexible ligand and in situ complex preparation methods. Cyclic voltammetry studies revealed that the neat complex undergoes reversible oxidation in dmf, which has been attributed to the MnII/III redox couple, whereas the two heterogeneous catalysts show different electrochemical behaviour in aqueous medium. The encapsulated and non-encapsulated homogeneous MnIIIsalen complexes were screened as catalysts for olefin oxidation by using tBuOOH as the oxygen source in different solvents. Under the optimized conditions, the catalysts exhibited moderate activity. Both heterogeneous catalysts catalysed the oxidation of cyclohexene with tBuOOH, primarily to give the allylic oxidation products. These catalysts were found to be reusable after the catalytic cycle, but with some loss of activity. A DFT study confirmed the distortion of the complex in the zeolite cage, the main difference being observed for the bonded chloride.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据