物理化学学报 >> 2014, Vol. 30 >> Issue (1): 28-33.doi: 10.3866/PKU.WHXB201311011

热力学,动力学和结构化学 上一篇    下一篇

纳米银对铕-吡啶-2,6-二羧酸配合物荧光增强效应的研究

王悦辉1, 王婷2, 周济3   

  1. 1 电子科技大学中山学院化学与生物工程学院, 广东中山 528402;
    2 北京有色金属研究总院, 北京 100088;
    3 清华大学新型陶瓷与精细工艺国家重点实验室, 北京 100084
  • 收稿日期:2013-07-22 修回日期:2013-11-01 发布日期:2014-01-01
  • 通讯作者: 王悦辉 E-mail:wangzsedu@126.com
  • 基金资助:

    国家自然科学基金(61302044),广东省自然科学基金(S2012010010646)和电子科技大学中山学院科研启动基金(407YKQ06)资助项目

Studies of Enhanced Fluorescence Effects of Europium(Ⅲ) Dipicolinic Acid Complex by Silver Nanoparticles

WANG Yue-Hui1, WANG Ting2, ZHOU Ji3   

  1. 1 Department of Chemistry and Biology Engineering, University of Electronic Science and Technology of Zhongshan Institute, Zhongshan 528402, Guangdong Province, P. R. China;
    2 Beijing General Research Institute for Nonferrous Metals, Beijing 100088, P. R. China;
    3 State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
  • Received:2013-07-22 Revised:2013-11-01 Published:2014-01-01
  • Contact: WANG Yue-Hui E-mail:wangzsedu@126.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (61302044), Natural Science Foundation of Guangdong Province, China (S2012010010646), and Scientific Research Initial Foundation of University of Electronic Science and Technology of Zhongshan Institute, China (407YKQ06).

摘要:

研究了纳米银对分别以水、重水、乙醇和二甲基甲酰胺为溶剂的铕-吡啶-2,6-二羧酸(Eu(Ⅲ)DPA)配合物溶液的荧光增强效应. 研究结果表明,Eu(Ⅲ)DPA溶液中加入纳米银,电偶极跃迁(5D07F2)和磁偶极跃迁(5D07F1)发射强度先增强而后逐渐下降,5D07F2的荧光增强效率高于5D07F1的荧光增强效率. 在乙醇溶剂中纳米银对Eu(Ⅲ)DPA溶液的荧光增强效应最大. 在水或重水或乙醇溶剂中,Eu(Ⅲ)DPA的不对称率明显提高,而在二甲基甲酰胺溶剂中几乎不变. 分析认为,纳米银对Eu(Ⅲ)DPA溶液荧光的影响与纳米银表面等离子体共振与激发态荧光中心强烈耦合以及表面等离子体再吸收有关.

关键词: 纳米银, 铕配合物, 局部表面等离子体共振, 荧光增强, 溶剂

Abstract:

The enhanced fluorescence effect of silver nanoparticles on a europium complex, Eu(Ⅲ)DPA, where DPA is dipicolinic acid (C7H5NO4), with deionized (DI) water, heavy water, ethanol, and dimethylformamide as solvents, was studied. The results indicated that with increasing silver nanoparticle concentration, the intensities of the electric dipole transition (5D07F2)and magnetic dipole transition (5D07F1) first increased and then decreased, and the enhancement efficiency of 5D07F2 was higher than that of 5D07F1. The enhanced fluorescence effect of silver nanoparticles on Eu(Ⅲ)DPA was maximum in ethanol. In the DI water, heavy water, and ethanol solution systems, the asymmetric ratio increased significantly, but there was little change in the dimethylformamide solution system. The observed silver nanoparticle dependence of the luminescent intensity of Eu(Ⅲ)DPA was considered to be the result of stronger coupling between the surface plasmon resonance and the excited luminescence centers, and reabsorption of the surface plasmon resonance of silver nanoparticles.

Key words: Silver nanoparticle, Europium complex, Localized surface plasmons resonance, Enhanced fluorescence, Solvent

MSC2000: 

  • O647.3