N-乙基吡啶四(α-噻吩甲酰三氟丙酮)合铕的合成和晶体结构  

Synthesis and Crystal Stucture of Ethylpyridium Tetrakis (α-Thenoyltrifluoroacetone) - europate, Eu(TTA)_4 Epy

作　　者：黄春辉[1] 祝晓艳 郭凤瑜[1] 宋家庆[1] 许振华[1] 廖春生 金钟声[2] 

机构地区：[1]北京大学化学系 [2]中国科学院长春应用化学研究所

出　　处：《北京大学学报（自然科学版）》1992年第4期428-434,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金

摘　　要：合成了标题络合物的晶体,在四圆衍射仪上测得其晶体结构。晶体Eu(TTA)_4Epy属三斜晶系,P(?)空间群,中心离子Eu(Ⅲ)和4个TTA^-通过8个氧原子螯合配位,Epy为外界阳离子。晶胞参数如下:a=12.437(5),b=17.816(3),c=10,706(3)(?),α=90.92(2)°,β=102.01(3)°,γ=87.10(2)°,Z=2。此外,还对该化合物的热稳定性、红外及紫外可见光谱以及荧光性质进行了研究。The title complex has been synthesised, and its structure has been determined by four circle diffractometer. 5590 independent reflections were collected, of which 3391 [F>1.5σ(F)] were used for structure refining. The final deviation factor R = 0.0752, Rw = 0.0770. Data show that the structure belongs to triclinic, P1 space group. The crystal parameters are a = 12.437(5)A, b = 17.816(3)A, c = 10.706(3)A, α = 90.92(2)% β = 102.01(3)? γ = 87.10(3)? V = 2317.40A3, Z=2, F(000) = 1116, dalod = 1.63g/cm-1. The fluorscesce spectra of the complex shows that the fluorscence intensity is 12.3 or 0.5 fold increased comparing with Eu(TTA)3·2H2O or Eu(TTA)8·2TPPO respectively. The intensity ratio between 5D0→7F2 and 5D0→7F1 is 11.3 which shows good fluorscent monochromaticity. The thermostability, IR, UV were studied and discussed as well.

关 键 词：铕 N-乙基吡啶 络合物 HTTA 

分 类 号：O641.338[理学—物理化学]