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One-pot solvothermal synthesis of a well-ordered layered sodium aluminoalcoholate complex: a useful precursor for the preparation of porous Al[subscript 2]O[subscript 3] particles

Author(s)
Li, Xiansen; Michaelis, Vladimir K.; Ong, Ta-Chung; Smith, Stacey J.; McKay, Ian; Griffin, Robert Guy; Wang, Evelyn; Mueller, Peter; ... Show more Show less
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Abstract
One-pot solvothermal synthesis of a robust tetranuclear sodium hexakis(glycolato)tris(methanolato)aluminate complex Na[subscript 3][Al[subscript 4](OCH[subscript 3])[subscript 3](OCH[subscript 2]CH[subscript 2]O)[subscript 6]] via a modified yet rigorous base-catalyzed transesterification mechanism is presented here. Single crystal X-ray diffraction (SCXRD) studies indicate that this unique Al complex contains three pentacoordinate Al[superscript 3+] ions, each bound to two bidentate ethylene glycolate chelators and one monodentate methanolate ligand. The remaining fourth Al[superscript 3+] ion is octahedrally coordinated to one oxygen atom from each of the six surrounding glycolate chelators, effectively stitching the three pentacoordinate Al moieties together into a novel tetranuclear Al complex. This aluminate complex is periodically self-assembled into well-ordered layers normal to the [110] axis with the intra-/inter-layer bonding involving extensive ionic bonds from the three charge-counterbalancing Na[superscript +] cations rather than the more typical hydrogen bonding interactions as a result of fewer free hydroxyl groups present in its structure. It can also serve as a valuable precursor toward the facile synthesis of high-surface-area alumina powders using a very efficient rapid pyrolysis technique.
Date issued
2014-01
URI
http://hdl.handle.net/1721.1/95975
Department
Massachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Mechanical Engineering; Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
Journal
CrystEngComm
Publisher
Royal Society of Chemistry, The
Citation
Li, Xiansen, Vladimir K. Michaelis, Ta-Chung Ong, Stacey J. Smith, Ian McKay, Peter Müller, Robert G. Griffin, and Evelyn N. Wang. “One-Pot Solvothermal Synthesis of a Well-Ordered Layered Sodium Aluminoalcoholate Complex: a Useful Precursor for the Preparation of Porous Al[subscript 2]O[subscript 3] Particles.” CrystEngComm 16, no. 14 (2014): 2950.
Version: Author's final manuscript
ISSN
1466-8033

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