Eu_2(3,4-DMBA)_6(PHEN)_2的晶体结构及HRS研究  

Crystal Structure and HRS Study of Eu 2(3,4 DMBA) 6(PHEN) 2

作　　者：王利亚[1] 郑向军[1] 金林培[1] 吕少哲[2] 

机构地区：[1]北京师范大学化学系 [2]中国科学院激发态物理开放实验室

出　　处：《高等学校化学学报》1999年第7期1110-1114,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金;攀登计划预选项目

摘　　要：合成了铕（Ⅲ）与３，４－二甲基苯甲酸（３，４－ＨＤＭＢＡ）、邻菲咯啉（ＰＨＥＮ）形成的晶体配合物Ｅｕ２（３，４－ＤＭＢＡ）６（ＰＨＥＮ）２．测定其分子量Ｍ＝１５５９．３５，晶体属三斜晶系，Ｐ１空间群，ａ＝１．２６６５（４）ｎｍ，ｂ＝１．３５６７（４）ｎｍ，ｃ＝１．０７５５（４）ｎｍ，α＝９８．８７（３）°，β＝１０８．２５（３）°，γ＝８７．９８（２）°，Ｚ＝１，最终的偏离因子Ｒ＝０．０３１．以Ｅｕ（Ⅲ）离子为荧光探针，在７７Ｋ下测定了配合物的高分辨光谱（ＨＲＳ）．铕配合物的激发光谱、发光光谱、时间分辨光谱和发光寿命测定结果表明。An europium complex of 3,4 HDMBA and PHEN, Eu 2(3,4 DMBA) 6(PHEN) 2 was synthesized. The complex crystallizes in triclinic system, space group P 1 with a = 1 266 5(4) nm , b = 1 356 7(4) nm , c= 1 075 5(4) nm , α = 98 87(3)° , β = 108 25(3)° , γ = 87 98(2)° , Z =1, R =0 031, M = 1 559.35 . Bonding around each europium consists of two oxygen atoms from the bidentate chelated 3,4 DMBA, four oxygen atoms from four bridging 3,4 DMBA groups and two nitrogen atoms of a 1,10 phenanthroline molecule. The two europium atoms are bridged by the tetrakis(carboxylato O,O′ ) groups forming a dimer. Its high resolution spectra(HRS) were observed at 77 K with the Eu(Ⅲ) ion as the fluorescence probe. The results of its excitation spectra, emission spectra, time resolution spectra and emission lifetime show that there exist two Eu(Ⅲ) ion sites in the complex.

关 键 词：二甲基苯甲酸 邻菲咯啉 铕 三元 配合物 晶体 

分 类 号：O614.338[理学—无机化学]