Structural features of intercalated CaFe-layered double hydroxides studied by X-ray diffractometry, infrared spectroscopy and computations

The intercalation of various N-containing carboxylic acid anions into CaFe-layered double hydroxides was performed by the dehydration–rehydration method. Particular attention was paid to the effect of solvent mixture used during preparation. It was found that various solvent mixtures resulted in different interlayer distances and, thus, different arrangements of the anions between the layers. The dimensions of the intercalated anions and detailed analysis of the infrared spectra gave clues for the reasonable prediction of the spatial arrangements of the anions in the interlamellar space.