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4666994 
Journal Article 
Epoxidation of Alkenes with Molecular Oxygen Catalyzed by Immobilized Co(acac)(2) and Co(bpy)(2)Cl-2 Complexes within Nanoreactors of Al-MCM-41 
Farzaneh, F; Jalalian, M; Tayebi, L 
2012 
0 
E-Journal of Chemistry
ISSN: 0973-4945
EISSN: 2090-9810 
9 
4 
2205-2212 
WOS:000303776600064 
Cobalt complexes with different ligands such as bipyridine, and acetylacetonate were immobilized within nanoreactors of Al-MCM-41, designated as Co(acac)(2)/Al-MCM-41 and Co(bipy)(2)(2+)/Al-MCM41. The immobilized complexes were characterized by XRD, N-2-adsorption desorption, FT-IR and UV-Vis techniques. It was found that Co(bipy)(2)(2+)/Al-MCM41 and Co(acac)(2)/Al-MCM-41 successfully catalyze the oxidation of norbornene, styrene, cis-stilbene, trans-stilbene, and cyclohexene with 68% to 100% conversion and 41% to 90% selectivity toward the corresponding epoxides. No desorption was observed during the course of reactions. 
Cobalt complexes; Immobilization; Al-MCM-41; Epoxidation; Molecular oxygen