Luminescence Properties of Europium and Terbium Complexes with Pyridine or Bipyridine Linked Oligothiophene Ligand
来源期刊：Journal of Rare Earths2007年第S1期
论文作者：刘平 梁禄生 胡建华 张雅敏 冯桂菊 邓文基
文章页码：355 - 357
摘 要：With an aim to develop novel luminescence materials, europium and terbium complexes of 2, 5-（2-thiophene）-pyridine （TPY）, 5, 5′-bis（5-（2, 2′-bithiophene））-2, 5-pyridine （B2TPY） and 5, 5′-bis（5-（2, 2′-bithiophene））-2, 2′-bipyridine （B2TBPY） were synthesized, and their luminescence properties were studied. The complexes exhibited ligand-sensitized emission, which was typical of Eu（Ⅲ） and Tb（Ⅲ） ions. The excitation spectra of Eu（Ⅲ） and Tb（Ⅲ） complexes with TPY （or B2TPY or B2TBPY） show similar bands as these with the ligands. It suggests that, the excitation energy is absorbed by TPY or B2TPY or B2TBPY, the energy transfers from its excited single state to its triplet state, and finally transfers from the ligands to Eu（Ⅲ） and Tb（Ⅲ） ions. The luminescence of Eu（Ⅲ） and Tb（Ⅲ） ions in the TPY or B2TPY or B2TBPY complexes indicates that the metal ions are efficiently excited by the absorbed energy from excitation of the ligands.
刘平，梁禄生，胡建华，张雅敏，冯桂菊，邓文基
摘 要：With an aim to develop novel luminescence materials, europium and terbium complexes of 2, 5-（2-thiophene）-pyridine （TPY）, 5, 5′-bis（5-（2, 2′-bithiophene））-2, 5-pyridine （B2TPY） and 5, 5′-bis（5-（2, 2′-bithiophene））-2, 2′-bipyridine （B2TBPY） were synthesized, and their luminescence properties were studied. The complexes exhibited ligand-sensitized emission, which was typical of Eu（Ⅲ） and Tb（Ⅲ） ions. The excitation spectra of Eu（Ⅲ） and Tb（Ⅲ） complexes with TPY （or B2TPY or B2TBPY） show similar bands as these with the ligands. It suggests that, the excitation energy is absorbed by TPY or B2TPY or B2TBPY, the energy transfers from its excited single state to its triplet state, and finally transfers from the ligands to Eu（Ⅲ） and Tb（Ⅲ） ions. The luminescence of Eu（Ⅲ） and Tb（Ⅲ） ions in the TPY or B2TPY or B2TBPY complexes indicates that the metal ions are efficiently excited by the absorbed energy from excitation of the ligands.
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