Abstract
The kinetics and mechanism of the reactions of the Keggin oligomer, [AlO4Al12(OH)24(H2O)12]7+ (Al13), with a series of phenol based ligands have been investigated using the stopped-flow technique. Ligands studied include catechol, chlorogenic acid, L-dopa, gallic acid, gallic acid methyl ester, maltol, and salicylic acid. A mechanism is proposed that is consistent with the kinetic data. Formation of the initial bond is the rate determining step and subsequent breakdown of the Al13 oligomer is rapid.
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