Eu^(3+)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 Eu^(3+) IN M_5(PO_4)_3X

作　　者：滕玉洁[1] 黄竹坡[1] 

机构地区：[1]北京大学化学系,北京100871

出　　处：《无机化学学报》1993年第2期145-149,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助课题

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.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).

关 键 词：电荷迁移态 铕 碱土金属 卤磷酸盐 

分 类 号：O614.338[理学—无机化学]