首页 | 本学科首页   官方微博 | 高级检索  
     

氟化物中氧对Eu2+光谱的影响
引用本文:刘应亮,冯德雄,石春山. 氟化物中氧对Eu2+光谱的影响[J]. 暨南大学学报(自然科学与医学版), 2000, 21(3): 81-84
作者姓名:刘应亮  冯德雄  石春山
作者单位:1. 暨南大学化学系,广东,广州,510632
2. 中国科学院长春应用化学研究所,稀土化学与物理开放实验室,吉林,长春,l30022
摘    要:为了考察杂质阴离子对Eu^2+光谱的影响,应用光谱方法研究了复合氟化物中氧离子对氟离子的取代与Er^2+光谱变化的关系。结果表明:在KCaE3和BaY2F8基质中,氧的存在产生了Eu^2+新的发光中心,其中一种为正常的Eu^2+的发光中心,其中一种为正常的Eu^2+的发射中心,即Eu^2+(F^-)中心,另一种为氧离子对氟离子取代形成的发射中心,即Eu^2+(O^2-)中心;对于KCaF3基质,随

关 键 词:氟化物 氧 铕 荧光光谱 光谱性质 发射中心
文章编号:1000-9965(2000)03-00841-04
修稿时间:1999-09-14

Effect of oxygen on spectra of Eu2+ in the fluorides
LIU Ying-liang,FENG De-xiong,SHI Chun-shan. Effect of oxygen on spectra of Eu2+ in the fluorides[J]. Journal of Jinan University(Natural Science & Medicine Edition), 2000, 21(3): 81-84
Authors:LIU Ying-liang  FENG De-xiong  SHI Chun-shan
Affiliation:LIU Ying-liang,FENG De-xiong;(Dept. Of Chemistry, Jinan Uaiversity,Guangzhou 510632, China);SHI Chun-shan;( Laboratory of Rare Earth Chemistry and Physics,Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022, China)
Abstract:Spectrograph study was carried out to investigate the influence of O2- ion as impurity anion on the change of spectra of Eu2+ by substitution of O2- ion for F- ion in KCaF3 and BaY2F8. The results showed that there existed two kinds of luminescent centers of Eu2+, including Eu2+ (F-) center, a nor-mal emission center of Eu2+ in the these hosts, and Eu2+ (O2-) center, formed by substitution of O2-ion for F- ion. For KCaF3, emission intensity of Eu2 + (O2-) center became weak sharply by high tem-perature reaction with H2 as a reduction atmosphere. For BaY2F8, the excitation and emission wavelength of Eu2+(O2-) center was shifted to high energy with the increase of the content of H2 in reduction atmo-sphere. These were very different from Latlounett's results. Owing to the strength of Eu-O bonding influorides, once Eu2+(O2-) center was formed , it was impoasible to eliminate it entirely. This was dif-ferent from the case of comp|ex oxides with Eu2+(F-) new luminescent center due to the replacement of O2-ion by F- ion, Eu2+(F-) center being capable of rentoval by high temperature reaction in air.
Keywords:
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号