Synthesis and optical properties of europium pentafluoropropionate 1,10-phenanthroline complex and its silica glass

Abstract

Europium pentafluoropropionate 1,10-phenanthroline complex, Eu(C₂F₅COO)₃·Phen (Phen= 1,10-phenanthroline), were synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectroscopy and thermogravimetric analysis (TA). At the same time, its silica glass was synthesized by in situ processes. The excitation spectra of the complex demonstrate that the energy collected by “antenna ligands” was transferred to Eu³⁺ ions efficiently. The room-temperature PL spectra of the complexes are composed of the typical Eu³⁺ ions red emission, due to transitions between ⁵D₀→⁷F_{J(J = 0→4)}. The decomposition temperature of the complex was 290°C, which indicates the host complex is quite stable to heat. Then the affection of anneal temperatures on PL properties of SiO₂ glass were studied. The PL intensity of the SiO₂ glass annealed at 160°C was higher than other annealed temperatures for 24 h in air.

Keywords

organometallic complex / silica glass / luminescent property

References

[1] Fuhrmann T, Salbeck J. Organic materials for photonic devices. MRS Bulletin, 2003, 28(5): 354–359

[2] Kataoka Y, Paul D, Miyake H, Shinoda S, Tsukube H. A Cl–anion-responsive luminescent Eu³⁺ complex with a chiral tripod: ligand substituent effects on ternary complex stoichiometry and anion sensing selectivity. Dalton Transactions (Cambridge, England), 2007, (26): 2784–2791

[3] Shao N, Jin J Y, Wang G L, Zhang Y, Yang R H, Yuan J L. Europium(III) complex-based luminescent sensing probes for multi-phosphate anions: modulating selectivity by ligand choice. Chemical Communications, 2008, 9: 1127–1129

[4] Song B, Wang G L, Tan M Q, Yuan J L. A europium (III) complex as an efficient singlet oxygen luminescence probe. Journal of the American Chemical Society, 2006, 128(41): 13442–13450

[5] Tremblay M S, Halim M, Sames D. Cocktails of Tb³⁺ and Eu³⁺ complexes: a general platform for the design of ratiometric optical probes. Journal of the American Chemical Society, 2007, 129(24): 7570–7577

[6] Kin E, Fukudaa T, Yamauchia S, Hondaa Z, Oharab H, Yokoob T, Kijimab N, Kamataa N. Thermal stability of europium(III) chelate encapsulated by sol-gel glass. Journal of Alloys and Compounds, 2009, 480(2): 908–911

[7] Hench L L, West J K. The sol-gel process. Chemical Reviews, 1990, 90(1): 33–72

[8] Lehn J M. Perspectives in supramolecular chemistry from molecular recognition towards molecular information-processing and self-organization. Angewandte Chemie International Edition in English, 1990, 29(11): 1304–1319

[9] Jin L P, Lu S X, Lu S Z. Crystal structure and spectra of complex [Eu(o-ABA)₃bipy]bipy. Polyhedron, 1996, 15(22): 4069–4077

[10] de Sá G F, Malta O L, de Mello Donegá C, Simas A M, Longo R L, Santa-Cruz P A, da Silva E F Jr. Spectroscopic properties and design of highly luminescent lanthanide coordination complexes. Coordination Chemistry Reviews, 2000, 196(1): 165–195

[11] Hasegawa Y, Yamamuro M, Wada Y, Kanehisa N, Kai Y, Yanagida S. Luminescent polymer containing the Eu(III) complex having fast radiation rate and high emission quantum efficiency. Journal of Physical Chemistry A, 2003, 107(11): 1697–1702

[12] Malta O L, Legendziewicz J, Huskowska E, Turowska-Tyrk I, Albuquerque R Q, de Mello Donegá C, e Silva F R G. Experimental and theoretical study of ligand field, 4f–4f intensities and emission quantum yield in the compound Eu(bpyO₂)₄(ClO₄)₃. Journal of Alloys and Compounds, 2001, 323-324: 654–660

[13] de Farias R F, Alves Jr. S,Belian M F, Vieira M R S, de Souza J M, Pedrosa G G, de Sá G F. Spectroscopic study of transparent self-standing films of (3-glycidoxypropyl) trimethosysilane and (3-trimethoxysilylpropyl) ethylenediamine doped with europium complexes. Optical Materials, 2003, 24(3): 453–456

[14] Werts M H V, Jukes R T F, Verhoeven J W. The emission spectrum and the radiative lifetime of Eu³⁺ in luminescent lanthanide complexes. Physical Chemistry Chemical Physics, 2002, 4(9): 1542–1548

[15] Malta O L, Brito H F, Menezes J F S, e Silva F R G, Alves S Jr, Farias F S Jr, de Andrade A V M. Spectroscopic properties of a new light-converting device Eu(thenoyltrifluoroacetonate)₃ 2(dibenzyl sulfoxide). A theoretical analysis based on structural data obtained from a sparkle model. Journal of Luminescence, 1997, 75(3): 255–268

[16] Carnall W T, Crosswhite H, Crosswhite H M. Energy levels structure and transition probabilities of the trivalent lanthanides in LaF₃. Argonne National Laboratory: Argonne, IL, 1977

[17] de Mello Donegá C, Alves S Jr, de Sá G F. Synthesis, luminescence and quantum yields of Eu(III) mixed complexes with 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 1,10-phenanthroline-N-oxide. Journal of Alloys and Compounds, 1997, 250(1-2): 422–426

[18] Chen B, Luo Y H, Liang H, Xu J, Guo F Q, Zhang Y Z, Lin A B, Liu X. Optical properties of a tetradentate bis(β-diketonate) europium(III) complex. Spectrochimica Acta Part A, Molecular and Biomolecular Spectroscopy 2008, 70(5): 1203–1207

[19] Weber M J, Varitimos T E, Matsinger B H. Optical intensities of rare-earth ions in yttrium orthoaluminate. Physical Review B: Condensed Matter and Materials Physics, 1973, 8(1): 47–53

[20] Guan J B, Chen B, Sun Y Y, Liang H, Zhang Q J. Effects of synergetic ligands on the thermal and radiative properties of Eu(TTA)₃nL-doped poly(methyl methacrylate). Journal of Non-Crystalline Solids, 2005, 351(10-11): 849–855

[21] Nakamura K, Hasegawa Y, Kawai H, Yasuda N, Kanehisa N, Kai Y, Nagamura T, Yanagida S, Wada Y. Enhanced lasing properties of dissymmetric Eu(III) complex with bidentate phosphine ligands. Journal of Physical Chemistry A, 2007, 111(16): 3029–3037

[22] Babu P, Jayasankar C K. Optical spectroscopy of Eu³⁺ ions in lithium borate and lithium fluoroborate glasses. Physica B, Condensed Matter, 2000, 279(4): 262–281

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 61108061) and Chinese Academy of Science, Special Grant for Postgraduate Research, Innovation and Practice (NO. 200835).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg