Adducts of lanthanide beta-diketonates with 2,4,6-tri(2-pyridyl)-1,3,5-triazine: Synthesis, structural characterization, and photoluminescence studies

作者：De Silva Channa R; Maeyer Jenine R; Dawson Alice; Zheng Zhiping^*

来源：Polyhedron, 2007, 26(6): 1229-1238.

DOI：10.1016/j.poly.2006.10.049

• lanthanide complexes
• 2,4,6-tri(2-pyridyl)-1,3,5-triazine
• X-ray crystallography
• photoluminescence
• synthesis

Adducts of lanthanide beta-diketonates of the general formula LnL(3)(TPTZ) were synthesized and structurally characterized by single crystal X-ray diffraction [Ln = Eu3+, Tb3+, Er3+; L is the conjugate base of dibenzoylmethane (DBM), 1-benzoylacetone (BA), thenoyltrifluoroacetone (TTA), or 4,4,4-trifluoro-1-phenyl-1,3-butanedione (BTFA); TPTZ = 2,4,6-tri(2-pyridyl)-1,3,5-triazine, a rigid Lewis base with a large pi system]. The lanthanide ion in each of these complexes is nonacoordinate with six beta-diketonate oxygen atoms and three TPTZ nitrogen atoms, forming a coordination polyhedron best describable as a monocapped square antiprism. Characteristic red, green, and near infrared luminescence was observed for the Eu3+, Tb3+, and Er3+ complexes, respectively. All complexes showed significantly enhanced luminescence quantum yields when compared with the corresponding aqua analogues, with one of the Eu3+ complexes displaying a quantum yield of 69.7% in chloroform.

• 出版日期2007-4-11