Synthesis, Crystal Structure and Photoluminescent Properties of a New Uranium-Containing Silicotungstate

Abstract:

A new uranium-containing silicotungstate A-β-Na₁₄[Na₂(UO₂)₂(SiW₉O₃₄)₂]·43H₂O (1) was synthesized in an aqueous solution. The compound was characterized by elemental analysis and infrared spectra analysis. A single-crystal X-ray analysis was carried out on crystal (1) which crystallizes in triclinic system, space group p ī, with a = 13.386 Å, b = 13.506 Å, c = 16.183 Å, α = 85.337o, β = 73.608o γ = 64.833o and Z = 1. Polyanion (1) consists of two A-β-SiW₉ units which sandwich two uranium and two sodium ions, leading to a Keggin-type sandwich structure. The photoluminescent spectrum of (1) shows typical emission features of uranyl compounds.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 1840-1843
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.1840
• Online since: August 2013
• Authors: Rong Xin Tan, Shu Xin Cui, Hui Wang, Ya Ping Jiang, Wen Zhi Song
• Keywords: Crystal Structure, Photoluminescent Properties, Polyoxometalate, Uranium

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