immobilization of cu(ii)-histidine complex on al-mcm-41 as catalyst for epoxidation of alkenes

نویسندگان

f. farzaneh

چکیده

cu(ii) complex with l-histidine (his) ligand, immobilized within al-mcm-41, designated as cu(his)2/al-mcm-41 was prepared and characterized by powder x-ray diffraction (xrd), nitrogen adsorption desorption, ftir, uv-vis and chemical analysis techniques. the surface area and pore volume were found to decrease after immobilization of cu(ii) complex on al-mcm-41. it was found that cu(his)2/al-mcm-41 catalyze the oxidation of some alkenes such as norbornene and trans-stilbene with tert-butylhydroperoxide (tbhp) with high activity and selectivity to the corresponding epoxides. it was concluded that the al-mcm-41 nanoreactors is a suitable support for immobilization of biomimetic molecules. particularly significant is that no desorption was observed during the course of reactions.

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Immobilization of Cu(II)-Histidine Complex on Al-MCM-41 as Catalyst for Epoxidation of Alkenes

Cu(II) complex with L-histidine (His) ligand, immobilized within Al-MCM-41, designated as Cu(His)2/Al-MCM-41 was prepared and characterized by powder X-ray diffraction (XRD), nitrogen adsorption desorption, FTIR, UV-Vis and chemical analysis techniques. The surface area and pore volume were found to decrease after immobilization of Cu(II) complex on Al-MCM-41. It was found that Cu(His)2/Al-MCM-...

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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 sciences, islamic republic of iran

ناشر: university of tehran

ISSN 1016-1104

دوره 23

شماره 1 2012

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

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