STUDIES ON THE SOLID COMPLEXES OF RE(III) WITH PHYTIC ACID

The solid complexes of phytic acid with trivalent rare earth metals in aqueous solution were synthesized and characterized by means of eleme ntary analysis, IR and thermoanalysis. The composition of complexes [( C6H6)H-4(PO4)(6)](3) . RE(I)(8) . C2H5OH . xH(2)O (x=10 similar to 15, RE=Y, Pr, Gd, Tb, Er, Yb) was determined. The IR specra of complexes show that RE(I) is coordinated by O-P-O bridging group of phytic acid to form polynuclear polymer. In addition, the thermal decomposition ki netics of the complexes was investigated as well.