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Luminescent nanoparticles prepared by encapsulating lanthanide chelates to silica sphere

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Abstract

The luminescent nanoparticles were prepared by encapsulating the [LnL4]− (Ln = Eu, Tb; L = BTFA, HFAA, TTFA, TFAA) complexes anion into the silicon framework. We firstly synthesized a series of novel siloxy-bearing lanthanide complex precursor, and then encapsulated them into the silica sphere by a modified Stöber process. As a result, four europium and two terbium tetrakis β-diketonate complexes functionalized silica sphere nanoparticles were obtained and characterized in detail using Fourier transform infrared spectra, X-ray diffraction, scanning electronic microscope, thermogravimetric analysis, luminescence excitation and emission spectroscopy, luminescence lifetime measurements, and diffuse reflectance UV–Vis spectroscopy. The result shows that these luminescent nanoparticles maintain the distinctive luminescence character of lanthanide chelate including broad excitation spectra, line-like emission spectra, high quantum efficiency, and long luminescent lifetime, which makes them great potential application in the synthesis of luminescent nanoparticle.

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Acknowledgments

The work was supported by the National Natural Science Foundation of China (20971100, 91122003) and Program for New Century Excellent Talents in University (NCET-08-0398).

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Authors and Affiliations

  1. Department of Chemistry, Tongji University, Siping Road 1239, Shanghai, 200092, China

    Qiu-Ping Li & Bing Yan

  2. State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, China

    Qiu-Ping Li & Bing Yan

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  1. Qiu-Ping Li
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Correspondence to Bing Yan.

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Li, QP., Yan, B. Luminescent nanoparticles prepared by encapsulating lanthanide chelates to silica sphere. Colloid Polym Sci 292, 1385–1393 (2014). https://doi.org/10.1007/s00396-014-3196-x

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  • DOI: https://doi.org/10.1007/s00396-014-3196-x

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