immobilization of a molybdenum complex with tetradentate ligand on mesoporous material mcm-41 as catalyst for epoxidation of olefins

نویسندگان

m. masteri-farahani

p. eghbali

f. salimi

چکیده

covalent grafting of mcm-41 with 3-chloropropyl trimethoxysilane and subsequent reaction respectively with acacdien and complexation with moo2(acac)2 afforded moo2acacdien@mcm-41. x-ray diffraction and nitrogen sorption analyses revealed the preservation of the textural properties of the support as well as accessibility of the channel system despite sequential reduction in surface area, pore volume and pore size. elemental analyses showed nearly complete complexation of the supported ligands and the presence of 0.24 mmol molybdenum per gram of the catalyst. epoxidation of cyclooctene, 1-hexene and 1-octene in the presence of moo2acacdien@mcm-41 with tert-butyl hydroperoxide (tbhp) were carried out with relatively good conversion in the mild reaction conditions. morphology of product because the organic ligands around yttrium center act like a protecting agent to prevent agglomeration.

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Immobilization of a molybdenum complex with tetradentate ligand on mesoporous material MCM-41 as catalyst for epoxidation of olefins

Covalent grafting of MCM-41 with 3-chloropropyl trimethoxysilane and subsequent reaction respectively with acacdien and complexation with MoO2(acac)2 afforded MoO2acacdien@MCM-41. X-ray diffraction and nitrogen sorption analyses revealed the preservation of the textural properties of the support as well as accessibility of the channel system despite sequential reduction in surface area, pore vo...

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Immobilization of a molybdenum complex with tetradentate ligand on mesoporous material MCM-41 as catalyst for epoxidation of olefins

Covalent grafting of MCM-41 with 3-chloropropyl trimethoxysilane and subsequent reaction respectively with acacdien and complexation with MoO2(acac)2 afforded MoO2acacdien@MCM-41. X-ray diffraction and nitrogen sorption analyses revealed the preservation of the textural properties of the support as well as accessibility of the channel system despite sequential reduction in surface area, pore vo...

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عنوان ژورنال:
journal of nanostructures

ناشر: university of kashan

ISSN 2251-7871

دوره 1

شماره 1 2012

کلمات کلیدی
[ ' e p o x i d a t i o n ' , ' m c m ' , 4 1 , ' m o l y b d e n u m ' , ' s c h i f f b a s e ' ]

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