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- W2357788377 abstract "The immobilization of metallocene on inorganic carrier to provide the corresponding heterogeneous catalyst is a very interesting subject, not only for the practical purpose but also for scientific research. In this work, silica MCM-41 is selected as an inorganic carrier, and SiCl_4 is firstly allowed to reacted to the surface silanol to afford Cl_2Si-OSi(O-Si≡)_3 group on the MCM-41 surface. The unreacted MCM-41 surface silanol is protected by the reacting with ClSi(CH_3)_3. Then cyclopentadienyl group is introduced by reacting with cyclopentadienyl sodium, and then ZrCl_4 is allowed to reacted with the cyclopentadienyl lithium on MCM-41 surface, finally zirconocene dichloride moiety is covalently grafted to the MCM-41 by this one-pot five-steps procedure. XRD, +(29)Si and+(13)C MAS NMR, nitrogen adsorption and desorption analysis etc. are employed to characterize this organic-inorganic hybrid catalyst material, and it is compared with MCM-41 and the zirconocene dichloride supported MCM-41 samples. It indicates that the zirconocene catalyst is successfully grafted by covalent bonding to the surface of MCM-41." @default.
- W2357788377 created "2016-06-24" @default.
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- W2357788377 date "2004-01-01" @default.
- W2357788377 modified "2023-09-24" @default.
- W2357788377 title "Covalent Grafting of Zirconocene Dichloride Moiety on MCM-41" @default.
- W2357788377 hasPublicationYear "2004" @default.
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