| Eu3+在碱土金属卤磷酸盐中的格位对称性及电荷迁移态 |
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| 引用本文： | 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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| 作者姓名： | 滕玉洁 黄竹坡 |
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| 作者单位： | 北京大学化学系 北京100871(滕玉洁)，北京大学化学系 北京100871(黄竹坡) |
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| 基金项目： | 国家自然科学基金资助课题 |
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| 摘 要： | 在254nm紫外光激发下研究了Eu~(3+)在Sr_3Ca_2(PO_4)_3Cl基质中的发光光谱.以Eu~(3+)为结构探针测定了Eu~(3+)所处晶格的点对称性.研究了M_5(PO_4)_3X(M=Ca,Sr,Ba;X=F,Cl,Br)基质组成改变对Eu~(3+)电荷迁移态的影响,以及温度对Ca_5(PO_4)_3Cl:Eu~(3+)发光强度的影响.
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| 关 键 词： | 电荷迁移态 铕 碱土金属 卤磷酸盐 |
| 收稿时间： | 1991-11-20 |
SITE SYMMETRY AND CHARGE TRANSFER STATE OF Eu3+ IN M5(PO4)3X |
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| Teng Yujie and Huang Zhupo. SITE SYMMETRY AND CHARGE TRANSFER STATE OF Eu3+ IN M5(PO4)3X[J]. Chinese Journal of Inorganic Chemistry, 1993, 9(2): 145-149 |
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| Authors: | Teng Yujie and Huang Zhupo |
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| Affiliation: | Department of Chemistry, Peking University, Beijing 100871 and Department of Chemistry, Peking University, Beijing 100871 |
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| 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). |
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| Keywords: | charge transfer state europium luminescence alkali earth halophosphate |
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