Preparation and characterisation of α-layered zirconium phosphate sulfophenylenphosphonates with variable concentration of sulfonic groups

@inproceedings{Alberti2005PreparationAC,
  title={Preparation and characterisation of α-layered zirconium phosphate sulfophenylenphosphonates with variable concentration of sulfonic groups},
  author={Giulio Alberti and Mario Casciola and Anna Donnadio and Paolo Piaggio and Monica Pica and Michele Sisani},
  year={2005}
}
Abstract Zirconium phosphate sulfophenylenphosphonates of general formula Zr(HPO 4 ) 2− x (SPP) x · n H 2 O, with SPP = O 3 PC 6 H 4 SO 3 H and x in the range 0.4–1.35, were precipitated from solutions containing H 3 PO 4 , H 2 SPP and ZrF 6 2− . The SPP/HPO 4 ratio in the solids is equal to the H 2 SPP/H 3 PO 4 ratio in the starting solutions for x  ≤ 1 and lower for x  > 1. The results coming from 31 P MAS NMR, X-ray powder diffraction, FTIR-PAS spectroscopy and density measurements, as well… CONTINUE READING

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