Lanthanide(III) Complexes with Thiodiacetato Ligand: Chemical Speciation, Synthesis, Crystal Structure, and Solid-State Luminescence

The synthesis, crystal structures, and luminescence of two lanthanide polynuclear complexes with the general formula [Ln2(tda)3(H2O)5]·3H2O (Ln = Sm, Eu; tda thiodiacetato anion) are reported. compounds were obtained by direct reaction H2tda lanthanide(III) chloride in an aqueous solution. choice conditions synthesis was based on speciation studies. structure polymeric contains Ln(III) ions a tricapped trigonal prism geometry. versatility this ligand provides different coordination modes provokes formation thick 2D sheets. Direct excitation gives place to characteristic intra-configuration sharp emission both solid state.