晶场效应和化学键性质对Eu^(2+)光谱结构的影响  

Effect of Crystal-Field and Bonding Properties on Spectral Structure of Eu^(2+)

作　　者：满石清[1] 石春山[1] 

机构地区：[1]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

出　　处：《化学学报》1990年第7期648-652,共5页Acta Chimica Sinica

基　　金：国家自然科学基金

摘　　要：合成了掺Eu^(2+)的单一氟化物五种和复合氟化物六种;研究了Eu^(2+)在基质中的跃迁发射随晶场、化学键性质变化的规律,在一些低配位数、强晶场的体系中观察到了Eu^(2+)的f→F跃迁发射,首次在室温下,观察到单一氟化物AlF_3:Eu^+中的t→f跃迁发射。Five Eu^(2+)-doped simple fluorides and six Eu^(2+)-doped complex fluorides are synthesized by solid reactions. The strength of the crystal-field at the sites of Eu^(2+) ion, and the degroe of covalenco of Eu—F bond in these hosts are discussed. The f-f transition emission of Eu^(2+) ion is observed in the hosts which has lower coordination number and strong crystal-field. The f-f transition emission of Eu^(2+) ion is observed for the first time in the simple fluoride AlF_3.

关 键 词：铕^2+ 光谱结构 晶场效应 化学键 

分 类 号：O614.338[理学—无机化学]