LUMINESCENT LANTHANIDE TETRAKIS-COMPLEXES WITH DIPHENYL-N-BENZOYLAMIDOPHOSPHATE AND TETRAETHYLAMMONIUM CATION

Abstract

A row of new lanthanide CAPh-type ligand based anionic tetrakis-complexes of general formula NEt4[LnL4] (Ln = La, Nd, Eu, Gd, Tb, Lu; HL=С6H5CONHPO(ОC6H5)2) have been synthesized. The ligands bidentate-chelating mode of coordination with formation of anionic tetrakis-complexes was proposed based on elemental analysis and IR, NMR and absorption spectroscopies data. The obtained europium and terbium complexes exhibit sensitized by CAPh ligands intense emission with decay time 1.7 і 2.0 ms respectively. For the europium complex the emission quantum yield was found to be equal 37% and the europium emission sensitization by organic ligand equals 56%.

Keywords

• координаційні сполуки лантаноїдів
• фотолюмінесценція
• карбациламідофосфати