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Synthesis and Effects of Heat Treatments on Luminescence Behavior of a Templated Borate

Authors

  • Xuetao Xu,

    Corresponding author
    1. Center for Engineering Materials and Reliablity, HKUST Fok Ying Tung Graduate School, Guangzhou, Guangdong, 511458, P. R. China
    • Center for Engineering Materials and Reliablity, HKUST Fok Ying Tung Graduate School, Guangzhou, Guangdong, 511458, P. R. China, Fax: +86-20-34685665

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  • Kanyi Liang,

    1. Center for Engineering Materials and Reliablity, HKUST Fok Ying Tung Graduate School, Guangzhou, Guangdong, 511458, P. R. China
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  • Yirou Lin

    1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, P. R. China
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Abstract

Templated pentaborates have potential application as LEDs. The organically templated pentaborate [C2H8N][B5O6(OH)4] (A) was synthesized by the reaction of dimethylamine with boric acid in pyridine solution and the compound was characterized by elemental analysis, FT-IR and photoluminescence spectroscopy as well as TG-DTA analysis and powder X-ray diffraction. The crystallographic structure of A was determined by single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group Pequation image with the parameters of a = 8.893(7) (Å), b = 8.902(7) (Å), c = 16.967(16) (Å), α = 102.620(12)°,β = 102.817(11)°, γ = 99.107(5)°, V = 1247.5(18) Å3 and Z = 4. The luminescent properties of the compound were studied, and a purple-pink luminescence occurs with an emission maximum at 473 nm. The photoluminescence of A can be changed from purple-pink to white by means of a simple heat-treatment process. The white-light-emission of the as-synthesized sample G makes the pentaborate a good candidate for display and lighting applications in white LEDs.

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