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Issue 16, 2019
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Grafting of a new bis-silylamido aluminum species on silica: insight from solid-state NMR into interactions with the surface

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Abstract

The new bisamido aluminum species [AlCl{N(SiMe3)2}2(THF)] (1) was prepared and fully characterized by 27Al and 35Cl solid-state NMR, along with X-ray diffraction studies. 1 was grafted on silica partially dehydroxylated at 700 °C, affording silica-supported Al species. The resulting material (2) was characterized by IR, elemental analysis and 1H, 13C and 27Al solid-state MAS NMR. The 1D and 2D 27Al MAS NMR studies showed the occurrence of two types of species, where the Al center adopts a tetracoordinated coordination sphere, with as an additional coordinated Lewis base, either a THF ligand or a silica-surface siloxane moiety. DFT calculations allowed understanding the grafting mechanism and the spectroscopic properties of the material.

Graphical abstract: Grafting of a new bis-silylamido aluminum species on silica: insight from solid-state NMR into interactions with the surface

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Publication details

The article was received on 25 Feb 2019, accepted on 18 Mar 2019 and first published on 19 Mar 2019


Article type: Paper
DOI: 10.1039/C9DT00845D
Dalton Trans., 2019,48, 5243-5252

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    Grafting of a new bis-silylamido aluminum species on silica: insight from solid-state NMR into interactions with the surface

    T. Vancompernolle, N. Merle, F. Capet, I. Del Rosal, M. Laurent, L. Delevoye, F. Pourpoint and R. M. Gauvin, Dalton Trans., 2019, 48, 5243
    DOI: 10.1039/C9DT00845D

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