期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 2013, 期 29, 页码 5103-5109出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201300560
关键词
Heterogeneous catalysis; Cobalt; Epoxidation; Hydrothermal synthesis; Structure elucidation
资金
- Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BPD/71798/2010]
- Programa Operacional Ciencia e Inovacao (POCI)
- Fundo Social Europeu (FSE)
- Fundo Europeu de Desenvolvimento Regional (FEDER)
Two new 3D metal-organic frameworks (MOF), [Co(H-2-DHBDA)(bpe)](n) (1) and [Co(H-2-DHBDA)(bpee)](n) (2) [H-2-DHBDA = 2,5-dihydroxy-1,4-benzenediacetate, bpe = 1,2-bis(4-pyridyl)ethylene, bpee = 1,2-bis(4-pyridyl)ethane], were synthesized hydrothermally. Both compounds have a similar 3D structure. The secondary building unit is a Co-2 dimer with a CoCo distance of 4.02 angstrom. The hydroxy groups remain free on the surface of the compounds, and they participate in the intramolecular hydrogen bonding. A detailed structural analysis revealed that the structure is a 7-c uninodal net with the Schlafli symbol 3(3).4(13).5(4).6 and the vertex symbol [3.3.3.4.4.4.4.4.4.4.4.4.4.4.4.*.*.*.*.*.*]. The compound is catalytically active towards epoxidation reactions in heterogeneous medium with H2O2 as an oxidant. They catalyze the epoxidation of almost all types of olefinic substrates with good efficiency. After the reaction, the catalysts can be recovered quite easily, and they can be used for further reactions without any loss of activity for several cycles.
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