| 稀土与3-羧基苯磺酸、2-(4-吡啶基)-咪唑[4,5-f]菲咯啉构筑的双核配合物的合成、晶体结构及表征 | |
| Syntheses, Crystal Structures and Characterization of Binuclear Lanthanide Complexes with 3-Sulfobenzoate and 2-(4-Pyridyl)imidazole[4,5-f]phenanthroline | |
| 摘要: 以3-羧基苯磺酸根(3-SBA)和2-(4-吡啶基)-咪唑[4,5-f]菲咯啉(4-PDIP)为配体,用水热法合成了3种稀土配合物:[Ln2(3-SBA)2(4-PDIP)2(OH)2(H2O)4]·2H2O(Ln=Sm (1),Eu (1)和Gd (3))。用X-射线单晶衍射分析方法测定了其晶体结构。配合物1~3为同构的双核分子。2个羟基以桥联方式连接2个Ln(Ⅲ)离子,3-SBA和4-PDIP以螯合双齿形式与Ln(Ⅲ)离子配位。双核分子之间通过氢键构筑成三维超分子结构。配合物1和3分别在 545 nm 和 529 nm 处出现来自于配体的荧光发射,对应于配体的π*-π的跃迁。配合物2呈现Eu(Ⅲ)离子的特征发射,位于579、592、612、650和696 nm处的发射峰分别对应于5D0→7Fj (j=0~4)跃迁。 | |
| 关键词: 稀土配合物 3-羧基苯磺酸 晶体结构 荧光 | |
| 基金项目: 国家自然科学基金(No.21471104)资助项目。 | |
| Abstract: Taking 3-sulfobenzoate (3-SBA) and 2-(4-pyridyl)imidazole[4,5-f]phenanthroline (4-PDIP) as the ligands, three lanthanide complexes, [Ln2(3-SBA)2(4-PDIP)2(OH)2(H2O)4]·2H2O (Ln=Sm (1), Eu (2), Gd (3)) were obtained by hydrothermal method. The crystal structures were determined by single crystal X-ray diffraction. The three complexes are binuclear molecules. In the complexes, two Ln(Ⅲ) ions are linked by two hydroxyl groups in bridging-bidentate coordination mode. 3-SBA and 4-PDIP ligands are coordinated with Ln(Ⅲ) ions by the chelating bidentate coordination mode. The three-dimensional supramolecular structure is formed through the hydrogen bonds between binuclear molecules. Complexes 1 and 3 display intense broad emission bands at 545 nm and 529 nm, respectively, which correspond to the π*-π transition of the ligands. Complex 2 presents the characteristics emission of Eu(Ⅲ) ion. The narrow emission bands at 579, 592, 612, 650 and 696 nm are attributed to 5D0→7Fj (j=0~4) transitions of the Eu(Ⅲ) ion, respectively. CCDC: 1046171, 1; 1046169, 2; 1046170, 3. | |
| Keywords: lanthanide complex 3-sulfobenzoate crystal structure fluorescence | |
| 投稿时间：2014-10-09 修订日期：2015-01-21 | |
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| 李佳佳,宋爽,马豆,乔丽,谷怡,钱凤云,李夏.稀土与3-羧基苯磺酸、2-(4-吡啶基)-咪唑[4,5-f]菲咯啉构筑的双核配合物的合成、晶体结构及表征[J].无机化学学报,2015,31(4):717-724. | |
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