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Aluminium complexes in methanol-water mixture as studied by 27Al NMR nuclear magnetic resonance.

Samadi-Maybodi A

Department of Chemistry, Faculty of Basic Sciences, Mazandaran University, Babolsar 47415, Iran. samadi@umz.ac.ir

(27)Al NMR spectroscopy can be used for study of coordination and solvation in both aqueous and non-aqueous solutions. Various octahedral and tetrahedral aluminium complexes have been proved to exist in solution by (1)H and (27)Al NMR spectroscopy. (27)Al nuclear magnetic resonance (NMR) spectroscopy also can be used to determine thermodynamic properties of complexes in the solution. The formation of [Al(OH)(4-n)(CH(3)OH)(n)]((n-1)+) (n=1, 2, 3 and 4) species through the reaction of aluminate anion with methanol has been investigated by (27)Al NMR spectroscopy. (27)Al NMR spectra reveal evidence for Al bound to one, two, three and four CH(3)OH, the production of aluminate species is affected by the MeOH/H(2)O. Results obtained from 2D EXSY experiments clearly confirm there are exchanges among the species.

Published 9 June 2006 in Spectrochim Acta A Mol Biomol Spectrosc, 64(4): 1025-31.
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