| Eu3+在碱土金属卤磷酸盐中的格位对称性及电荷迁移态 |
| SITE SYMMETRY AND CHARGE TRANSFER STATE OF Eu3+ IN M5(PO4)3X |
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| 摘要: 在254nm紫外光激发下研究了Eu3+在Sr3Ca2(PO4)3Cl基质中的发光光谱.以Eu3+为结构探针测定了Eu3+所处晶格的点对称性.研究了M5(PO4)3X(M=Ca,Sr,Ba;X=F,Cl,Br)基质组成改变对Eu3+电荷迁移态的影响,以及温度对Ca5(PO4)3Cl:Eu3+发光强度的影响. |
| 关键词: 电荷迁移态 铕 发光 碱土金属 卤磷酸盐 |
| 基金项目: 国家自然科学基金资助课题 |
| Abstract: Photoluminescent properties of Eu3+ in Sr3Ca2(PO4)3Cl host has been studied.Eu3+ ions were determined to be located on the 6h sites of C3 point symmetry in Sr3Ca2(PO4)3Cl by the method of luminescent probe.The center of charge transfer state (CTS) of Eu3+ ions in M5(PO4)3X (M=Ca,Sr,Ba;X=F,Cl,Br) shifts to longer wavelength as the host cations or anions change from lighter elements to heavier ones.Temperature dependence of the emission intensity of Eu3+ in Ca5(PO4)3Cl has been investigated and the quenching temperature of Eu3+ emission by the excitation into its CTS (254nm) is lower than that by the excitation into its f-f transitions (394nm). |
| Keywords: charge transfer state europium luminescence alkali earth halophosphate |
| 投稿时间：1991-11-20 |
| 摘要点击次数: 1859 |
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| 滕玉洁,黄竹坡.Eu3+在碱土金属卤磷酸盐中的格位对称性及电荷迁移态[J].无机化学学报,1993,9(2):145-149. |
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