MA Rui-jun, ZHAO Yong-liang, Wuren Qimuge, LI Xin, SUN Hui-juan. Synthesis and Fluorescence Properties of Doped Europium Benzene-1 ,3 ,5-tricarboxylate Complexes[J]. Chinese Journal of Luminescence, 2010,31(6): 920-925
MA Rui-jun, ZHAO Yong-liang, Wuren Qimuge, LI Xin, SUN Hui-juan. Synthesis and Fluorescence Properties of Doped Europium Benzene-1 ,3 ,5-tricarboxylate Complexes[J]. Chinese Journal of Luminescence, 2010,31(6): 920-925DOI:
Synthesis and Fluorescence Properties of Doped Europium Benzene-1 ,3 ,5-tricarboxylate Complexes
5-tricarboxylate complexes have been synthesized and characterized. Elemental analysis
rare earth coordination titration
IR spectra
UV absorption spectra and TG-DTA were used to characterized these complexes. The studies of the fluorescence spectra and lifetimes of the nine complexes show obviously difference. Compared with binary complex of Eu
L
6H
2
O(1)
the ternary complex Eu
LL
'
1.5
2H
2
O exhibits stronger luminescence intensity. This result indicates that the fluorescence intensities of the complexes depend on ligands. In the binary complex the ligand (btc) transfers some energy to Eu
3+
but in ternary complexes both the ligands (btc and phen) transfer more energy. The fluorescence peak positions of the other seven are similar to (1) and (2)
but the luminescence intensities of these complexes are obviously different. The positions of Eu
3+
emission peak of the complexes do not change
indicating that the introduction of doped rare earth ions or transition-metal ions does not influence the energy level of Eu
3+
in the complexes. The dinuclear complexes
which contain the metal ions Y
3+
La
3+
Zn
2+
and Cd
2+
without unsa-turated d-layer or f-layer electrons
display sensitization and strengthening to fluorescence properties of those complexes
respectively. Therefore
the energy absorption by organic ligands will not be consumed by the d-d or f-f transfer. In this manner
Eu
3+
absorbs much more energy through intramolecular energy transfer and luminous intensity is enhanced. Gd
3+
has inert half-full 4f
7
electronic configuration
so the luminous intensity of (5) is also strong and similar with (3) and (4). Complexes (8) and (9)
containing Mn
2+
and Ni
2+
respectively
exhibit fluorescence quenching
which is caused by the unsaturated d-layer electrons consuming the energy in the form of radiative transition.
关键词
Keywords
references
De Silva C R, Wang R Y, Zheng Z P. Highly luminescent Eu(Ⅲ) complexes with 2,4,6-tri(2-pyridyl)-1,3,5-triazine ligand: Synthesis, structural characterization, and photoluminescence studies [J]. Polyhedron, 2006, 25 (17):3449-3455.[2] Sabbatini N, Guardigli N, Lehn J M. Luminescent lanthanide complexes as photochemical supramolecular devices [J]. Coord. Chem. Rev., 1993, 123 (1-2):201-228.[3] Khreis O M, Curry R J, Somertom M, et al. Infrared organic light emitting devices using neodymium tris-(8-hydro oxyquoline) [J]. J. Appl. Phys., 2000, 88 (1):777-780.[4] Yang Hong, Cai Lihua. Studies on the spectra of rare earth dinuclear complexes with o-phenanthroline hydrate [J]. Chin. J. Spectroscopy Laboratory (光谱实验室), 2003, 20 (1):18-20 (in Chinese).[5] Zhang Renjie, Yang Kongzhang. Fluorescence character of rare earth complex with high efficient green light in ordered molecular films [J]. Longmuir, 1997, 13 (26):7141-7145.[6] Ishizaka T, Tero-Kubota S, Kurokawa Y. EPR studies on defects in sol-gel derived alumina films [J]. J. Phys. Chem. Solids, 2003, 64 (5):801-806.[7] Wu Renqimuge, Zhao Yongliang, Wei Xiaoyan, et al. Synthesis, characterization and fluorescence properties of the solid complexes of rare earth with trimesic acid and 1,10-phenanthroline [J]. China Rare Earths (稀土), 2009, 30 (2):1-4 (in Chinese).[8] Zhang Mei, Zhao Yongliang, Zhao Yanfang, et al. Studies on fluorescence property of Eu3+ dinuclear complexes with 2-thiopheneacetic acid and o-phenanthroline [J]. Chin. J. Lumin. (发光学报), 2008, 29 (5):827-832 (in Chinese).[9] Manhass B S, Trikha A K. The relationship between the direction of shifts in carbon-oxygen stretching frequencies of carboxylate complexes and the type of carboxylate coordination [J]. J. India. Chem. Soc., 1982, 6 :315-319.[10] Zhao Yongliang, Zhao Fengying. Study on infrared and fluorescence spectra of Eu(La) complexes with o-phenanthroline and p-phthalic acid [J]. J. Chin. Rare Earth Society (中国稀土学报), 2001, 19 (5):398-401 (in Chinese).[11] Wang Liufang, Wu Jigui, Peng Zhouren, et al. Study on ternary complexes of rare earth elements Ⅳ. Syntheses and properties of ternary complexes of rare earth elements with 3,5-dinitrosalicylic acid and phenanthroline [J]. Chinese Journal of Inorganic Chemistry (无机化学学报), 1990, 48 (2):141-146 (in Chinese).[12] Wei Xiaoyan, Zhao Yongliang, Xue Zhen, et al. Synthesis, characterization and fluorescence property of Dy3+ with halobenzoic acid and nitrogen-heterocyclic complexes [J]. Chin. J. Lumin. (发光学报), 2009, 30 (1):108-112 (in Chinese).[13] Zhao Yongliang, Zhao Fengying, Xue Zhen, et al. Infrared spectra and luminescent properties of p-tert-butylcalic[8] arene-DMF complexes of rare earth nitrates [J]. Chin. J. Lumin. (发光学报), 2006, 27 (3):358-362 (in Chinese).