Synthesis, spectroscopic studies and structure prediction of the new Tb(3-NH2PIC)3·3H2O complex

The synthesis, spectroscopic properties and structure prediction of the complex of Tb(III) with 3-aminopyridine-2-carboxylic acid (3-NH2PIC) are described. The complex was characterized by elemental analysis and IR, absorption and emission spectra. The C, H and N elemental analysis consistent with the formulation of the compound as Tb(3-NH2PIC)3·3H2O. This complex exhibits a luminescence intensity that is attenuated to that of its Eu+3 congener. The Sparkle model, used for structural computations of lanthanide complexes (SMLC), was applied to the new complex. The calculation used an INDO/S-CI model for determination of the electronic spectrum.