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Grafting of a new bis-silylamido aluminum species on silica: insight from solid-state NMR into interactions with the surface.
- Source :
-
Dalton Transactions: An International Journal of Inorganic Chemistry . 4/28/2019, Vol. 48 Issue 16, p5243-5252. 10p. - Publication Year :
- 2019
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SILOXANES
*SURFACE interactions
*ALUMINUM
*LEWIS bases
*SILICA
*SPECIES
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 48
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 135918638
- Full Text :
- https://doi.org/10.1039/c9dt00845d