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Issue 24, 2012
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Postfunctionalization of periodic mesoporous silica SBA-1 with magnesium(ii) and iron(ii) silylamides

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Abstract

Magnesium silylamide complexes Mg[N(SiHMe2)2]2(THF)2 and Mg[N(SiPhMe2)2]2 were synthesized according to transsilylamination and alkane elimination protocols, respectively, utilizing Mg[N(SiMe3)2]2(THF)2 and [Mg(n-Bu)]2 as precursors. Cage-like periodic mesoporous silica SBA-1 was treated with donor solvent-free dimeric [Mg{N(SiHMe2)2}2]2, [Mg{N(SiMe3)2}2]2 and monomeric Mg[N(SiPhMe2)2]2, producing hybrid materials [Mg(NR2)2]@SBA-1 with magnesium located mainly at the external surface. Consecutive grafting of [Mg{N(SiHMe2)2}2]2 and [FeII{N(SiHMe2)2}2]2 onto SBA-1 led to heterobimetallic hybrid materials which exhibit complete consumption of the isolated surface silanol groups, evidencing intra-cage surface functionalization. All materials were characterized by DRIFT spectroscopy, nitrogen physisorption and elemental analysis.

Graphical abstract: Postfunctionalization of periodic mesoporous silica SBA-1 with magnesium(ii) and iron(ii) silylamides

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Supplementary files

Article information


Submitted
30 Jan 2012
Accepted
12 Apr 2012
First published
17 Apr 2012

Dalton Trans., 2012,41, 7319-7326
Article type
Paper

Postfunctionalization of periodic mesoporous silica SBA-1 with magnesium(II) and iron(II) silylamides

T. Deschner, M. Klimpel, M. Tafipolsky, W. Scherer, K. W. Törnroos and R. Anwander, Dalton Trans., 2012, 41, 7319
DOI: 10.1039/C2DT30219E

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