A new oxovanadium(IV)-cucurbit[6]uril complex: Properties and potential for confined heterogeneous catalytic oxidation reactions

作者：de Lima Silvania Marilene; Gomez Jorge Antonio; Barros Valeria P; Vertuan Greice de S; Assis Marilda das Dores; de Oliveira Graeff Carlos Frederico; Demets Gregoire Jean Francois^*

来源：Polyhedron, 2010, 29(15): 3008-3013.

DOI：10.1016/j.poly.2010.08.001

• Cucurbit[6]uril
• Oxovanadium(IV)
• Coordination compound
• Size-selective catalysis

This work presents a new oxovanadium(IV)-cucurbit[6]uril complex, which combines the catalytic properties of the metal ion with the size-excluding properties of the macrocycle cavity. In this coordination compound, the VO(2-) ions are coordinated to the oxygen atoms located at the rim of the macrocycle in slightly distorted square-pyramidal configurations, which are in fact C(2v) symmetries. This combination results in a size-selective heterogeneous catalyst, which is able to oxidize linear alkanes like n-pentane at room temperature, but not styrene, cyclohexane or z-cyclooctene, which are too big to enter the cucurbit[6]uril cavity. The results presented here contribute to understanding the mechanism of alkane catalytic oxidation by oxovanadium(IV) complexes.

• 出版日期2010-10-14