Photoluminescent Layered Lanthanide Silicate Nanoparticles

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• 作者：Duarte Ananias ; Stanislav Ferdov ; Filipe A. Almeida Paz ; Rute A. Sá ; Ferreira ; Artur Ferreira ; Carlos F. G. C. Geraldes ; Lu&#xed ; s D. Carlos ; Zhi Lin ; Joã ; o Rocha
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：January 8, 2008
• 年：2008
• 卷：20
• 期：1
• 页码：205 - 212
• 全文大小：1323K
• 年卷期：v.20,no.1(January 8, 2008)
• ISSN：1520-5002

文摘

The first examples of nanoparticles of pure layered Ln₂(SiO₄H)(OH)₂(H₂O)Cl (where Ln = Eu, Gd, and Tb) and mixed microcrystalline layered lanthanide silicates containing different Eu/Gd and Tb/Gd ratios have been reported. The crystal structure of these silicates has been solved from synchrotron powder X-ray diffraction data. These materials display interesting and tuneable photoluminescence (PL) properties, such as energy transfer between different Ln³⁺ centers, illustrated here with the pairs Eu³⁺/Gd³⁺ and Tb³⁺/Gd³⁺. The PL properties of the mixed Eu³⁺/Gd³⁺ sample change upon F^– for Cl⁻ ion exchange, and this raises the possibility that this material may be exploited for sensing these ions.