Abstract: The solid complexes of diiodofluorcsccin and fluorescein with rare earth elements were prepared by a new method.Some physical and chemical properties of these compounds were investigated,such as IRspectra,TGcurves and X-ray powder diffraction diagram,electric conductance and solubility in different solvents.The composition of these compounds have been ascertained by chemical and elemental analyses.The solid complexes of diiodofluorcsccin and fluorescein with rare earth elements were prepared by a new method.Some physical and chemical properties of these compounds were investigated,such as IRspectra,TGcurves and X-ray powder diffraction diagram,electric conductance and solubility in different solvents.The composition of these compounds have been ascertained by chemical and elemental analyses.