| NH4F-LnF3体系的合成及荧光性质 | |
| Systematic Synthesis of Ammonium Rare Earth Fluorides and the Luminescent Properties of NH4GdF4∶Eu | |
| 摘要: 利用稀土氧化物与NH4HF2的直接反应和水热合成方法系统地研究了NH4F-LnF3体系?直接反应的主要产物是NH4LnF4?LnF3和NH4Ln2F7;水热反应的主要产物则是NH4Ln3F10和LnF3 | |
| 关键词: 稀土氟化物 水热合成 真空紫外 能量传递 | |
| 基金项目: | |
| Abstract: NH4F-LnF3(Ln=rare earth) systems were systematically studied by direction reaction of Ln4O3 and NH4HF2 and hydrothermal synthesis. For the direction reactions, the products tend to be NH4LnF4 for the light rare earths (Ln=La-Dy) and NH4Ln2F7 for the heavy rare earths (Ln=Ho-Lu and Y); while the hydrothermal condition favors the formation of NH4Ln3F10 compounds. The luminescent properties under vacuum ultraviolet light(VUV) were studied for the Eu3+ doped NH4GdF4. The Gd3+ ions transfer their energy efficiently to the Eu3+ ions, and the predominant emission of Eu3+ is the 5D0 → 7F2 transition, demonstrating that the rare earth ions occupy the non-centrosymmetrical sites in NH4GdF4. | |
| Keywords: ammonium rare earth fluorides hydrothermal synthesis vacuum ultraviolet (VUV) energy transfer | |
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| 由芳田,王颖霞,林建华,陶冶,巨新,侯雪颖.NH4F-LnF3体系的合成及荧光性质[J].无机化学学报,2002,18(1):41-44. | |
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