𝜆−Zirconium phosphate adipate dimethyl sulphoxide, 𝜆-ZrPO₄(OOC-(CH₂)₄-COOH)(CH₃)₂SO, is prepared by means of topotactic anion exchange of the chloride ligand of 𝜆-Zirconium phosphate, 𝜆-ZrPO₄Cl(CH₃)₂SO, with adipate. The samples are characterized by thermal analyses, X-ray diffractometry and FT-IR spectrophotometry. The used analysis approaches provide strong evidence that the chloride monovalent anions of 𝜆-Zirconium phosphate are completely exchanged with the carboxylate groups of the adipate monoanionic ligands. Moreover, the adipate ligands replace the chloride anions in a 1:1 stoichiometry. In this case the formula of the derivative should contain the monoanionic adipate fragment: (OOC-(CH₂)₄-COOH). This formula is in agreement with TGA and elemental analysis. With respect to intercalation properties, the synthesized adipate-solid phase has a higher acidic character and a larger gallery height in comparison to the pristine 𝜆-Zirconium phosphate (1.47, 1.02 nm, respectively). Therefore, this material is expected to be a suitable host for intercalation of huge basic guests.

A new layered organic-inorganicmaterial based on 𝜆-Zirconium phosphate (𝜆-ZrP) and ethylenediaminetetraacetic acid (H₄Y) has been prepared. The thermal analyses, X-ray diffractometry and FT-IR spectrophotometry confirm the introduction of H₄Y inside the interlayer gallery of 𝜆-ZrP. The pristine 𝜆-ZrP and its new polyaminocarboxylic acid functionalized derivative (𝜆-ZrPH₂Y) exhibit high potential for the application in the area of hard water treatment, where their Ca²⁺ uptake capacities are found to be 32.0 and 40.4mg Ca²⁺ per gram of 𝜆-solid, respectively.