【摘要】 合成了掺Eu²⁺的单一氟化物五种和复合氟化物六种;研究了Eu²⁺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Eu²⁺的f→F跃迁发射,首次在室温下,观察到单一氟化物AlF₃:Eu⁺中的t→f跃迁发射。更多还原

【Abstract】 Five Eu²⁺-doped simple fluorides and six Eu²⁺-doped complex fluorides are synthesized by solid reactions. The strength of the crystal-field at the sites of Eu²⁺ ion, and the degroe of covalenco of Eu—F bond in these hosts are discussed. The f-f transition emission of Eu²⁺ ion is observed in the hosts which has lower coordination number and strong crystal-field. The f-f transition emission of Eu²⁺ ion is observed for the first time in the simple fluoride AlF₃.更多还原