title: Synthesis and grafting of CAN-derived tetravalent cerium alkoxide silylamide precursors onto mesoporous silica MCM-41.
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.
authors: Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway.
authors: Alan R
authors: AR
authors: Crozier
authors: Christoph
authors: C
authors: Schädle
authors: Cäcilia
authors: C
authors: Maichle-Mössmer
authors: Karl W
authors: KW
authors: Törnroos
authors: Reiner
authors: R
authors: Anwander