Intercalation of 2,2 '-bipyrtdyl, 2,4 '-bipyridyl and 4,4 '-bipyridyl intogamma-zirconium phosphate. Physical-chemical characterization and solvent effect on the intercalation

The uptake into gamma-zirconium phosphate by batch method of 2,2'-bipyridyl , 2,4'-bipyridyl, and 4,4'-bipyridyl in ethanol:water solutions of various solvent ratios has been studied. The obtained materials were examined by po wder X-ray diffraction (PXRD), thermogravimetric and differential thermal a nalysis (TG-DTA) techniques, and UV-vis, IR and Raman spectroscopy. It has been found that the ligand content into the exchanger depends on batch temp erature, ligand:exchanger ratio in the contact batch, ethanol:water solvent ratio, and isomeric nitrogen position in the diamines. The highest uptake was obtained for the ligand 2,2'-bipyridyl with an ethanol:water ratio of 1 :9. (C) 1999 Elsevier Science Ltd.