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Synthesis and Luminescence Properties of Immobilized Europium β-CD Complexes on Silica

Abstract

Functionalized silica gel organic–inorganic hybrid materials based on covalently grafted lanthanide coordinations onto organosilicone have been the subject of intense study due to their superior physicochemical properties. However, it cannot be assumed that all the primary guest molecules can be directly covalent-grafted onto the host that prevents H2O molecules from coordinating with the central ion; the introduction of a medium could be useful in this regard. In the present work, a medium β-cyclodextrin (β-CD) was employed, and by sol–gel and molecular assembly processes, immobilization of a europium–β-CD inclusion on silica and the preparation of a novel fluorescent polymeric hybrid material β-CD–TESPIC–TTA–Eu were achieved. This research shows that β-CD can prevent the H2O molecules from coordinating with the central ion Eu3+ (inclusion). The novel hybrid material has an amorphous and homogeneous network surface and exhibits excellent film-forming properties, bright-red light emission that is dominated by the 5D0 → 7F2 transition of Eu3+, and a lifetime of 0.44 ms.

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Acknowledgements

The project was supported by Hebei Education Foundation (ZD2017214).

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Correspondence to Wen Jun Zhang.

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Zhang, W.J., Chen, Y., Zhang, S.P. et al. Synthesis and Luminescence Properties of Immobilized Europium β-CD Complexes on Silica. J Inorg Organomet Polym 28, 1294–1298 (2018). https://doi.org/10.1007/s10904-018-0787-x

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  • DOI: https://doi.org/10.1007/s10904-018-0787-x

Keywords

  • Molecular assembly
  • Sol–gel preparation
  • Polymeric europium complexes
  • Optical materials