Single-Site Tetracoordinated Aluminum Hydride Supported on Mesoporous Silica. From Dream to Reality!
KAUST DepartmentKAUST Catalysis Center (KCC)
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AbstractThe reaction of mesoporous silica (SBA15) dehydroxylated at 700 °C with diisobutylaluminum hydride, i-Bu2AlH, gives after thermal treatment a single-site tetrahedral aluminum hydride with high selectivity. The starting aluminum isobutyl and the final aluminum hydride have been fully characterized by FT-IR, advanced SS NMR spectroscopy (1H, 13C, multiple quanta (MQ) 2D 1H-1H, and 27Al), and elemental analysis, while DFT calculations provide a rationalization of the occurring reactivity. Trimeric i-Bu2AlH reacts selectively with surface silanols without affecting the siloxane bridges. Its analogous hydride catalyzes ethylene polymerization. Indeed, catalytic tests show that this single aluminum hydride site is active in the production of a high-density polyethylene (HDPE). © 2016 American Chemical Society.
CitationWerghi B, Bendjeriou-Sedjerari A, Jedidi A, Abou-Hamad E, Cavallo L, et al. (2016) Single-Site Tetracoordinated Aluminum Hydride Supported on Mesoporous Silica. From Dream to Reality! Organometallics 35: 3288–3294. Available: http://dx.doi.org/10.1021/acs.organomet.6b00454.
SponsorsThe research reported in this publication was supported by funding from the King Abdullah University of Science and Technology (KAUST). The authors are grateful to the KAUST Supercomputing Laboratory (KSL) for the resources provided under the project k1087.
PublisherAmerican Chemical Society (ACS)