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Issue 15, 2013
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Synthesis and grafting of CAN-derived tetravalent cerium alkoxide silylamide precursors onto mesoporous silica MCM-41

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Abstract

The heteroleptic tetravalent cerium complex [Ce(OiPr)3{N(SiMe3)2}]2 was synthesised by treating ceric ammonium nitrate (CAN) sequentially with sodium isopropoxide and lithium bis(trimethylsilyl)amide in THF. The trivalent ate complex [Ce(OiPr)2{N(SiMe3)2]2}][Li(thf)2] was also isolated from these reaction mixtures. A transsilylamination reaction of [Ce(OiPr)3{N(SiMe3)2}]2 with tetramethyldisilazane produced a considerable amount of homoleptic Ce[N(SiHMe2)2]4. The polymeric complex [Li2Ce2(OiPr)10(1,4-dioxane)]n was isolated as an additional ligand redistribution product. When tetravalent complexes Ce[N(SiHMe2)2]4, Ce[N(SiMe3)2]3Cl and Cp3CeCl were allowed to react with samples of periodic mesoporous silica MCM-41, Ce(IV) hybrid materials were produced. All hybrid materials were characterised via N2 physisorption, elemental analysis and DRIFT spectroscopy.

Graphical abstract: Synthesis and grafting of CAN-derived tetravalent cerium alkoxide silylamide precursors onto mesoporous silica MCM-41

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Article information


Submitted
14 Dec 2012
Accepted
24 Jan 2013
First published
29 Jan 2013

Dalton Trans., 2013,42, 5491-5499
Article type
Paper

Synthesis and grafting of CAN-derived tetravalent cerium alkoxide silylamide precursors onto mesoporous silica MCM-41

A. R. Crozier, C. Schädle, C. Maichle-Mössmer, K. W. Törnroos and R. Anwander, Dalton Trans., 2013, 42, 5491
DOI: 10.1039/C3DT33005B

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