Synthesis, crystal structure and photoluminescence properties of a new rare-earth carbonate na3eu(co3)(3)6h2o

• RONG-HUA ZHANG ^[1] ; DAN ZHAO ^[1] ; MIN HUANG ^[1] ; RUI-JUAN YANG ^[1] ; FA-XUE MA ^[1] ; YUN-CHANG FAN ^[1]
  1. [1] Henan Polytechnic University

     Henan Polytechnic University

     China

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 62, Nº. 1, 2017, págs. 3403-3406
• Idioma: inglés
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• Resumen

  • A new sodium europium carbonate hydrate, Na3Eu(CO3)3•6H2O, has been prepared using the hydrothermal method, and its structure was determined by single crystal X-Ray diffraction analysis for the first time. It crystallizes in the polar hexagonal space group P6(3) with a = 11.382(9) Å, c = 5.989(5) Å, V = 672.06(9) ų, Z = 2, Mr = 509.06, Dc = 2.516 g/cm³, F(000) = 492, μ(MoKα) = 4.84 mm-1, R1 = 0.015 and wR = 0.038. The structure features a three-dimensional (3D) framework composed of planar (CO3)2- triangles, Eu3+ ions and Na+ ions, which delimits 1D infinite chains with a hexangular star appearance along the c-axis. The IR spectrum and the self-activated photoluminescence properties were studied. Under the excitation of near UV light (395nm), it shows strong red emission at 618 nm with a lifetime of 348.7 μs. Present research indicates that Na3Eu(CO3)3•6H2O is a promising red phosphor for white light-emitting diodes.