XANES at Eu-L3 edge and valence of europium in SrB_4O_7: Eu and BaB_8O_(13): Eu  

作　　者：梁宏斌 胡天斗 王淑彬 曾庆华 裴治武 苏锵 

机构地区：[1]Laboratory of Rare Earth Chemistry and Physics , Changchun Institute of Applied Chemistry,Chinese Academy of Sciences, Changchun, Jilin 130022 , China [2]Laboratory of Synchrontron Radiation , Institute of High Energy Physics ,Chinese Academy of Sciences, Beijing, 100039, China

出　　处：《Chinese Journal of Chemistry》2000年第3期294-296,共3页中国化学（英文版）

基　　金：Project supported by the State Key Project of Basic Research (Project 973) (No. G1998061312), the National Natural Science Foundation of China (No. 29771029) and the Foundation of Laboratory of Beijing Synchrontron Radiation, Institute of High Energy Phy

摘　　要： The luminescent materials SrB4O7: Eu and BaB8O13: Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at Eu-L3 edge. It is found that the Eu3+ and Eu2+ ions are all present in the materials, and more Eu3+ ions can be reduced in SrB4O7: Eu than in BaB8O13:Eu. The excitation and emission spectra of Eu3+ in SrB4O7: Eu and BaB8O13:Eu were determined.The luminescent materials SrB4O7: Eu and BaB8O13: Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at Eu-L3 edge. It is found that the Eu3+ and Eu2+ ions are all present in the materials, and more Eu3+ ions can be reduced in SrB4O7: Eu than in BaB8O13:Eu. The excitation and emission spectra of Eu3+ in SrB4O7: Eu and BaB8O13:Eu were determined.

关 键 词：Strontium tetraborate barium octaborate EUROPIUM valence state XANES luminescence 

分 类 号：O614[理学—无机化学]