Citation: LI Jing-Jing, LI Yuan, WANG Ai-Ling, QU Yan-Rong, YUE Bin, ZHOU Dan, CHU Hai-Bin, ZHAO Yong-Liang. Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure[J]. Acta Physico-Chimica Sinica, ;2014, 30(12): 2328-2334. doi: 10.3866/PKU.WHXB201409292 shu

Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure

1.
College of Chemistry and Chemical Engineering, Inner Mon lia University, Hohhot 010021, P. R. China

Received Date: 31 July 2014
Available Online: 29 September 2014
Fund Project: 国家自然科学基金(21161013) (21161013) 内蒙古自然科学基金(2011MS0202) (2011MS0202)内蒙古重大基础研究开放基金(2010KF03)资助 (2010KF03)

Three types of Ag@SiO₂ nanoparticles with silica shell thicknesses of around 10, 25, and 80 nm were prepared. Europium complexes with benzoate (BA) in different proportions, 1, 10-phenanthroline (phen) and 2, 2'-bipyridine (bpy), were synthesized and characterized. The results suggest that the complexes have the formulas Eu(BA)_nCl_3-n ·2H₂O (n=1, 2, 3), Eu(phen)Cl₃ ·2H₂O, and Eu(bpy)Cl₃ ·2H₂O. The luminescence spectra of the complexes showed that adding Ag@SiO₂ nanoparticles increased the fluorescence intensity. The fluorescence enhancement sequence of the different silica shell thickness Ag@SiO₂ nanoparticles was 25 nm> 80 nm>10 nm, which showed that the local surface plasmon resonance was strongest at the silica shell thickness of about 25 nm. Furthermore, the enhancement effect for the Eu(phen)Cl₃·2H₂O complex was the strongest and that for the benzoic complex Eu(BA)_nCl_3-n·2H₂O was the weakest in these complexes. For the three benzoic complexes, the enhancement effect of Eu(BA)₃·2H₂O was the lowest. The nitrogenous complexes (Eu(phen)Cl₃ and Eu(bpy)Cl₃) could combine withAg@SiO₂ nanoparticles very well, while the interaction of Eu(BA)₃· 2H₂O with Ag@SiO₂ nanoparticles was weaker. Ag@SiO₂ nanoparticles are expected to enhance luminescence of rare earth materials.
- Europium complex,
- Plasmon resonance,
- Ag@SiO₂ nanoparticle,
- Luminescence intensity,
- Core-shell structure
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO2 Core-Shell Structure

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Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure