Controlled step-wise isomerization of the Keggin-type Al13 and determination of the γ-Al13 structure†
Abstract
Partial hydrolysis of AlCl3 with Ca(OH)2 and the amino acid glycine enables the selective transformation of the Al13 Keggin structures, outlining the ε → δ → γ isomerization process. Through this, a new γ-Al13 Keggin structure was able to be isolated and characterized through 27Al NMR and single-crystal XRD.