The synthesis and structures of yttrium(III) complexes containing 2- naphthoyltrifluoroacetone (HTFNB); benzoyltrifluoroacetone (HTFPB) and N,N-dimethylN’-(9-methylanthracenyl)ethylenediamine (AnMe2) ligand are reported. The complexes have been characterized by IR, 1H NMR and single-crystal X-ray diffraction studies. The crystal structure of Y(TFNB)3AnMe2 (C3) and Y(TFPB)3AnMe2 (C4) were determined. X-ray crystallographic analysis demonstrates that in the mononuclear complex C3, C4, the Y3+ ion was coordinated by three TFNB/TFPB ligands and one ancillary ligand AnMe2. | HNUE JOURNAL OF SCIENCE Natural Sciences 2020 Volume 65 Issue 4A pp. 3-10 This paper is available online at http SYNTHESIS AND STRUCTURES OF YTTRIUM III COMPLEXES CONTAINING 2-NAPHTHOYLTRIFLUOROACETONE BENZOYLTRIFLUOROACETONE AND N N-DIMETHYL-N - 9-METHYLANTHRACENYL ETHYLENEDIAMINE LIGAND Dinh Thi Hien1 and Phan Thi Thu Ha2 1 The Faculty of Chemistry Hanoi National University of Education 2 The Faculty of Natural Science Tay Nguyen University Abstract. The synthesis and structures of yttrium III complexes containing 2- naphthoyltrifluoroacetone HTFNB benzoyltrifluoroacetone HTFPB and N N-dimethyl- N - 9-methylanthracenyl ethylenediamine AnMe2 ligand are reported. The complexes 1 have been characterized by IR H NMR and single-crystal X-ray diffraction studies. The crystal structure of Y TFNB 3AnMe2 C3 and Y TFPB 3AnMe2 C4 were determined. X-ray crystallographic analysis demonstrates that in the mononuclear complex C3 C4 the Y3 ion was coordinated by three TFNB TFPB ligands and one ancillary ligand AnMe2. Keywords lanthanide complexes β-Diketonate X-ray structure. 1. Introduction β-Diketonates are a family of the most widely investigated ligands in lanthanide complexes. They usually occur as keto-enol tautomerisms in solutions and in solids as evidenced by solution 1H NMR spectroscopy and single-crystal X-ray diffraction analyses. The β-diketonates have been recognized as efficient sensitizers so called antennae to achieving high harvest lanthanide emissions owing to the effectiveness of the energy transfer from the β-diketonate to the Ln3 cation. Thus this family of complexes have developed rapidly and attracted long-lasting interest because of their promising prospects in widespread applications ranging from materials science to biomedical analysis 1-6 . The structural characterization plays an important role in the development of the chemistry of β-diketonate lanthanide complexes. For the purpose of probing the formation and structure of the rare
