期刊
DALTON TRANSACTIONS
卷 48, 期 16, 页码 5243-5252出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt00845d
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资金
- Chevreul Institute [FR 2638]
- Ministere de l'Enseignement Superieur et de la Recherche, CNRS, Region Nord - Pas de Calais
- FEDER
- HPCs CALcul en Midi-Pyrenees (CALMIP-EOS) [0833]
The new bisamido aluminum species [AlCl{N(SiMe3)(2)}(2)(THF)] (1) was prepared and fully characterized by Al-27 and Cl-35 solid-state NMR, along with X-ray diffraction studies. 1 was grafted on silica partially dehydroxylated at 700 degrees C, affording silica-supported Al species. The resulting material (2) was characterized by IR, elemental analysis and H-1, C-13 and Al-27 solid-state MAS NMR. The 1D and 2D Al-27 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.
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