Fluorescence properties and application of doping complexes Eu_1−xL_x(TTA)₃Phen as light conversion agents

Abstract

Light conversion agents Eu_1−xL_x(TTA)₃Phen (L denotes La³⁺, Gd³⁺, Y³⁺) complexes were prepared, and the influence of doping ions on fluoresence properties was investigated by elementary analysis, FTIR and fluorescent spectra. The results show that FTIR spectra of Eu_1−xL_x(TTA)₃Phen complex system are identical with that of EuTTA₃Phen, which indicates that the complexes Eu_1−xL_x(TTA)₃Phen are similar in structure to Eu (TTA)₃Phen. For the above doping elements, co-fluorescence enhancement has the following order: Gd³⁺ > Y³⁺>La³⁺, and the optimum mole fractions of doping elements are 0.4, 0.2 and 0.5 respectively for Gd³⁺, Y³⁺, La³⁺. Among all the complexes, Eu_0.6Gd_0.4(TTA)₃Phen complex has the strongest fluorescent intensity. Applying Eu_0.6Gd_0.4(TTA)₃Phen complex to plastic and printing inks, bright red fluorescence plastic and printing inks are obtained when the content of europium reaches 0.1% (mass fraction).

Keywords

light conversion agent / rare complex / doping element / fluorescence

References

[1] LI Wen-lian. Progress in the study on rare earth complexes luminescence [J]. China Chemistry Bulletin, 1991,(8): 1–9. (in Chinese)

[2] ShuWan-yin, NiuCong-wei, ShenXiong-jun. Progress in the study on rare earth based light-conversion agents [J]. Chinese Rare Earth, 2000, 21(6): 64-66(in Chinese)

[3] KangJun, ZhangSong-pei, LiuYing-jun. Light conversion technology used in agriculture film [J]. China Plastics, 2000, 14(12): 42-48(in Chinese)

[4] LiJian-yu, ZhangSong-pei, ZengHong. Structure design of rare earth chelate based light conversion agents [J]. China Plastics, 1999, 13(1): 44-47(in Chinese)

[5] LI Jian-yu, ZHANG Song-pei, ZENG Hong. Rare earth complex in the capacity of light conversion agents [J]. Modern Chemical Industry, 1998, (12): 10–12. (in Chinese)

[6] WangZe-min. Advance in study of light transform farm film doped with rare earth in China [J]. Chinese Rare Earths, 2000, 21(5): 55-59(in Chinese)

[7] QinLi-jie, TianYan. The research on light conversion ability of light energy agriculture film [J]. China Plastics, 2002, 16(3): 53-59(in Chinese)

[8] WangZe-min, FuChu-jin, CaoJin-rong, et al.. Study on light-color effect of rare earth light transformation agricultural film[J]. China Plastics, 1999, 13(12): 21-23(in Chinese)

[9] ZhangSong-pei. Preparation of light transition agent BQ-one for farm [J]. Journal of Beijing Institute of Light Industry, 1998, 16(3): 18-20(in Chinese)

[10] ShuWan-yin, ZhouZhong-cheng, NiuCong-wei. Florescence of complexes of Eu (III) with aromatic carboxylic acid-1, 10-phenanthroline[J]. Trans Nonferrous Met Soc China, 2001, 11(5): 906-809

[11] ZhouZhong-cheng, ShuWan-yin, WangZheng-xiang. Spectra analysis and fluorescence sensitization of solid complexes Tb_1−xGd_xA₃ (A = o-Aminobenzoic acid, x=0−1) [J]. Chinese Journal of Spectroscopy Laboratory, 2002, 19(5): 569-572(in Chinese)

[12] PanifrahiB. S.. Fluorescence and co-fluoresence enhancement of Tb³⁺ and Eu³⁺ using phenyl phosphoric and phenyl phosphinic acids as ligands[J]. Journal of Luminescence, 1999, 82: 121-127

[13] LiWen-lian, LiWei-li, YuGui, et al.. Luminescence enhancement of Eu(III) or Tb(III) complexes with organic ligands by Ln(III) (Ln equivalent Y, La, Gd, Lu) [J]. J of Alloys and Compounds, 1993, 192(1–2): 34-36

[14] ZhangRen-jie, LiuHong-guo, ZhangCheng-ru, et al.. Influence of several compounds on the fluorescence of rare earth complexes Eu(TTA)₃Phen and Sm(TTA)₃Phen in LB films[J]. Thin Solid Films, 1997, 302: 223-230

[15] GaoGai-ling, ZhangAn-yun, HuangFeng-xia, et al.. Synthesis and columinescence effect of co-ordination compounds of rare earth with HTTA and Phen [J]. Journal of Shanxi Normal University, 1997, 25(1): 57-60(in Chinese)

[16] LiangXing-quan, ZengNeng. Advance in study of light transform farm film doped with rare earth in China[J]. Journal of Guangxi University, 2001, 26(4): 298-300(in Chinese)