SYNTHESIS AND CHARACTERIZATION OF MIXED-LIGAND COMPLEXES OF YTTRIUM AND LANTHANIDE(III)-BIS(PHENYLSULPHINYL)PROPANE AND BIPYRIDYL

A series of novel mixed ligand complexes of yttrium and lanthanide(III ) ions with bis(phenylsulphinyl)propane and bipyridyl have been synthe sized. The complexes were assigned the formula [Ln(bphsp)(3)(bipy) (Cl O4)](ClO4)(2) (bphsp = bis(phenylsulphinyl)propane; bipy = bipyridyl; Ln = La, Pr, Eu, Gd, Tb, Ho, Er, Yb, Y) and [Nd(bphsp)(3)(bipy)(ClO4)] (ClO4)(2) . 2H(2)O on the basis of analytical, conductance and spectra l (IR, electronic) and magnetic data. In all cases, the lanthanide ion bonds to the sulphoxide moiety via the oxygen atoms and to the bipy v ia the nitrogen atom. The coordination number of the complexes may be nine. The spectral strength for emission spectrum (D-5(0) --> F-7(2)) of Eu(bphsp)(3)(bipy)(ClO4)(3) was increased by the coordination of bi py.