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我们曾提出,电子组态具有共轭性的一对三价稀土离子,在一定条件下,会实现电子转移而产生价态变化.价态变化会明显改变材料的功能特性,因此,研究稀土元素价态变化,对新型功能材料设计具有重要意义.本工作研究了SrF_2:xEu,yTb磷光体中Eu-Tb的价态变化,发现SrF_2中,电子组态共轭的Eu~(3+)与Tb~(3+)在本实验条件下,可以实现电子转移.这一现象的发现有助于了解团相反应中稀土离子价态变化的规律.为寻找共轭稀土离子对之间实现电子转移条件提供了实验依据.
We have proposed that the electron configuration conjugate of a pair of trivalent rare earth ions, under certain conditions, will be the realization of electron transfer valence state changes valence changes will significantly change the functional properties of the material, therefore, the study of rare earth elements Variations of valences are of great significance for the design of novel functional materials.In this work, the valences of Eu-Tb in SrF_2: xEu, yTb phosphors were investigated. It was found that the electronic configurations of conjugated Eu ~ (3+) and Under the experimental conditions, Tb ~ (3+) can achieve electron transfer.The discovery of this phenomenon is helpful to understand the rule of valence change of rare earth ions in the heterogeneous reaction.In order to find the electron transfer between the conjugated rare earth ions, Conditions provide the experimental basis.