Monodispersed 尾-NaYF4 Mesocrystals: In Situ Ion Exchange and Multicolor Up- and Down-Conversions

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• 作者：Jianle Zhuang ; Xianfeng Yang ; Junxiang Fu ; Chaolun Liang ; Mingmei Wu ; Jing Wang ; Qiang Su
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：June 5, 2013
• 年：2013
• 卷：13
• 期：6
• 页码：2292-2297
• 全文大小：385K
• 年卷期：v.13,no.6(June 5, 2013)
• ISSN：1528-7505

文摘

Monodispersed 尾-NaYF₄ spindlelike mesocrystals have been successfully synthesized directly from Y(OH)_xF_3鈥?i>x as a precursor via a facile route. Detailed structural analyses demonstrated that the crystal framework structures of Y(OH)_xF_3鈥?i>x and 尾-NaYF₄ were identical. A possible mechanism based on in situ ion-exchange transformation has been proposed. The monodispersed 尾-NaYF₄ can be obtained through carefully controlled synthesis of the precursor. The photoluminescence properties of the 尾-NaYF₄ doped with various rare earth ions (such as Yb/Er, Yb/Tm, Pr, Nd, Sm, Eu, Tb, Dy, and Ho) were investigated and multicolor emission was achieved.