双酰胺稀土配合物的合成及荧光性能

崔海霞; 陈建敏; 周惠娣

发光学报, 2009, 30 (4): 457, 网络出版: 2009-12-30

双酰胺稀土配合物的合成及荧光性能

Synthesis and Fluorescence Properties of Rare Earth Complexes with a New Diamide Ligand

论文大纲

崔海霞陈建敏周惠娣

作者单位

中国科学院兰州化学物理研究所固体润滑国家重点实验室，甘肃兰州 730000

双酰胺配体稀土配合物荧光性能 diamide ligand fluorescence complexes fluorescence properties

摘要

为寻求发光性能良好的配合物，设计合成了一种新的双酰胺配体1,4-二［(2′-苄胺甲酰基苯氧基)癸氧基］苯(L)，并在氯仿和乙酸乙酯溶液中合成了其与硝酸钐、硝酸铕和硝酸铽的发光稀土配合物。元素分析数据表明稀土硝酸盐与配体形成的是 1∶1 型的配合物；红外光谱显示配合物具有相似的配位结构。对配体及其配合物的荧光进行了详细的研究，结果表明：钐、铕和铽配合物分别呈现出Sm3+、Eu3+、Tb3+的特征发射，铕离子处于不对称中心格位，硝酸铽配合物荧光相对强度最大。

Abstract

The study of the rare earth complexes has been an active research area, which may be attributed to the specific spectroscopic and magnetic properties of rare earth ions and the abundance of rare earth elements in our country. Amide-type ligands which are flexible in structure and have ‘terminal-group effects’, will shield the encapsulated rare earth ion from interaction with the surroundings effectively, and thus achieve strong luminescent properties. Aiming at good fluorescent rare earth complexes, a new diamide ligand 1,4-bis［(2′-benzylaminoformyl)phenoxyl-decatyl-oxy］ benzene (L) and its Sm(Ⅲ), Eu(Ⅲ) and Tb(Ⅲ) complexes were synthesized for the first time. The analytical data indicated that the three rare earth complexes conform to a 1∶1 metal-to-ligand stoichiometries Ln(NO3)3·L. The IR spectra show that the three complexes have similar IR spectra, of which the characteristic bands have similar shifts, suggesting that they have a similar coordination structure. The fluorescence properties of the ligand and its rare earth complexes were investigated in detail on Hitachi F-4500 spectrophotometer. The results indicated that the Sm, Eu and Tb complexes exhibit the characteristic emissions of Sm3+, Eu3+ and Tb3+, respectively. The fluorescence of the ligand and Sm, Eu complex is weak and the Eu3+ is not in a centro-symmetric coordination site. The Tb complex shows strong fluorescence, which could demonstrate the ligand L is a good organic chelator for Tb3+.

参考文献

[1] Shi Xiaoyan, Li Wenxian, Qin Caihua, et al. Synthesis and characterization of quaternary complexes of light rare earth perchlorate with diphenyl sulfoxide, benzoic acid and studies on fluorescence of Eu3+ complex ［J］. Chin. J. Lumin. (发光学报), 2008, 29(5):772-778 (in English).

[2] Zhang Wei, Zhao Yongliang, Zhao Yanfang, et al. Studies on fluorescence property of Eu3+ dinuclear complexes with 2-triopheneacetic acid and o-phenanthroline ［J］. Chin. J. Lumin. (发光学报), 2008, 29(5):827-832 (in Chinese).

[3] . Lanthanide complexes of the hexadentate N-donor podand tris[3-(2-pyridyl)pyrazolyl]hydroborate: Solid-state and solution properties[J]. Inorg. Chem., 1997, 36(1): 10-18.

[4] Beeby S, Faulkner S. Luminescence from neodymium(Ⅲ) in solution ［J］. Chem. Phys. Lett., 1997, 266(1-2):116-122.

[5] De S G F, Nunes L H A, Wang Z M, et al. Synthesis, characterization, spectroscopic and photophysical studies of ternary complexes of Eu(Ⅲ) with 3-aminopyrazine-2-carboxylic acid (HL) and heterobiaryl ligands (2,2′-bipyridine and 1,10-phenanthroline) ［J］. J. Alloys Compd., 1993, 196(1-2):17-23.

[6] Wen Xiaochun, Zhao Yongliang, Liu Yonggang, et al. Fluorescence property of Eu3+,Tb3+ terephthalic acid and 18-crown-6 complexes doped by non-fluorescence rare earth ［J］. Chin. J. Lumin. (发光学报), 2007, 28(6):959-965 (in Chinese).

[7] . A study of the fluorescence of some newly synthesized europium complexes with pyrazolone derivatives[J]. Spectrochimca Acta Part A, 2000, 56(14): 2645-2651.

[8] . Nine-coordinate lanthanide podates with predetermined structural and electronic properties: Facial organization of unsymmetrical tridentate binding units by a protonated covalent tripod[J]. J. Am. Chem. Soc., 1999, 121(40): 9326-9342.

[9] . Diastereoselective formation of chiral tris-cyclometalated iridium (Ⅲ) complexes: characterization and photophysical properties[J]. J. Am. Chem. Soc., 2004, 126(30): 9339-9348.

[10] . Open-chain polyethers. Influence of aromatic donor end groups on thermodynamics and kinetics of alkali metal ion complex formation[J]. J. Am. Chem. Soc., 1979, 101(10): 2588-2598.

[11] . The dual fluorescence nature of some N-monosubstituted salicylamides[J]. Bull. Chem. Soc. Jpn., 1976, 49(10): 2679-2682.

[12] . Synthesis and infrared and fluorescent spectra of rare earth complexes with a new amide ligand[J]. Spectrochimica Acta Part A, 2007, 68(3): 478-483.

[13] . Study on ternary coordination compounds of lanthanide elements with 1,10-phenanthroline-N-oxide and acetylacetone[J]. Acta Chim. Sin., 1990, 48(11): 1090-1095.

[14] . Correlation between the lowest triplet state energy level of the ligand and lanthanide(Ⅲ) luminescence quantum yield[J]. J. Lumin., 1997, 75(2): 149-169.

[15] . A p-tert-butylcalix[4]arene functionalised at its lower rim with ether-amide pendant arms acts as an inorganic-organic receptor: structural and photophysical properties of its lanthanide comp-lexes[J]. J. Chem. Soc., Dalton Trans., 2001, 21(10): 3205-3213.

崔海霞, 陈建敏, 周惠娣. 双酰胺稀土配合物的合成及荧光性能[J]. 发光学报, 2009, 30(4): 457. CUI Hai-xia, CHEN Jian-min, ZHOU Hui-di. Synthesis and Fluorescence Properties of Rare Earth Complexes with a New Diamide Ligand[J]. Chinese Journal of Luminescence, 2009, 30(4): 457.

双酰胺稀土配合物的合成及荧光性能

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