Eu_2（DBM）_64，4＇－BIPY的合成、光谱及铕（Ⅲ）格位

SYNTHESIS,SPECTRA AND Eu(Ⅲ)SITES OF Eu_2(DBM)_6 4, 4'-BIPY

合成了配合物Ｅｕ２（ＤＢＭ）６４，４＇－ＢＩＰＹ．ＩＲ和Ｒａｍａｎ光谱都证实了配合物的生成．７７Ｋ下激光激发高分辨激发光谱和离光光谱表明配合物存在５Ｄ０能级能量差别为１５ｃｍ－１的两种Ｅｕ（Ⅲ）格位，两种Ｅｕ（Ⅲ）离子均不位于对称中心．由５Ｄ０→７Ｆ０、１、２跃迁荧光光谱峰数判断，两种Ｅｕ（Ⅲ）格位的区域对称性均为Ｃ１或Ｃ２或Ｃ２．两种格位Ｅｕ（Ⅲ）离子的发光寿命分别为０．３７ｍｓ和０．３２ｍｓ．

The complex, Eu2 (DBM )64,4'-BIPY,is synthesized and characterized with elemental analysis,IR spectra and Raman spectra.High-resolved laser-excited excitation and luminescence spectra under 77K show that there are two Eu(Ⅲ) sites in the complex,and the energy difference between 5D0 levels of two Eu (Ⅲ) sites is 15 cm-1. Neither one of the two kinds of Eu(Ⅲ)ions is in symmetric center.The components of 5D0→7F0.1.2transitions indicate the local symmetries of both Eu(Ⅲ) sites are C1orC2 or C3.Luminescent lifetimes of the two kinds of Eu(Ⅲ)ions are 0.37 ms and 0. 32 ms respectively.