摘要
研究了高压后EuI2的结构及光谱性质,发现高压后其结构由单斜转化为正交,对称性和Eu2+配位数均有增加,4f65d能级间距加大,能级重心降低,还讨论了发射光谱的红移现象,指认了新出现的449nm处的发射峰,并报道了EuI2新的正交结构(EuI2-V)。
The structure and fluorescence properties of high-pressure-reated EuI2 were studied.The structural change of EuI2 from monoclinic to orthorhombic and the increase of both structural symmetry and coordination number of Eu2+ were observed respectively.It was found that high-pressure treatment could split the energy levels of 4f ̄65d and made the central energy levels lower so as to induce the red shift of emission spectra.Moreover,a new emission peak (449 nm) is assigned and a new phase(EuI_2-Ⅴ) is reported.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第10期1509-1512,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
国家科委"八.五"攀登计划基金
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资助