Heterogenization of a manganese(ii) acetonitrile complex on AlMCM-41 and AlMCM-48 molecular sieves by ion exchange
- 31 August 2005
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 15 (41) , 4441-4445
Abstract
An acetonitrile complex of composition [Mn(NCCH3)6][B(C6F5)4]2 (1) is grafted on Na-AlMCM-41/48 and H-AlMCM-41/48 by ion exchange. A metal loading of 0.25–0.6 wt% is achieved; the grafting of complex 1 is found to yield higher loading on Na-AlMCM-41/48 compared to H-AlMCM-41/48. Powder X-ray diffraction, N2 adsorption–desorption and TEM analysis of the grafted materials confirm the retention of long range ordering of the materials throughout the grafting process. FT-IR, EPR, TG-MS and elemental analyses confirm the successful grafting of the Mn(II) complex in the channels of the mesoporous materials, retaining the octahedral nitrile environment around the Mn2+ cation. The obtained materials are applied as heterogeneous initiators for the polymerization of isobutene.Keywords
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