四(α-噻吩甲酰三氟丙酮)合铕(Ⅲ)酸十六烷基吡啶LB膜的研究  

Langmuir-Blodgett Film Based on Metal Complex C_5H_5NC_(16)H_(33)Eu(TTA)_4

作　　者：王科志[1] 黄春辉[1] 姚光庆[1] 徐光宪[1] 崔大付[2] 樊烨 

机构地区：[1]北京大学化学系,北京100871 [2]中国科学院电子学研究所

出　　处：《高等学校化学学报》1993年第2期150-153,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：标题配合物(Ⅰ)和硬脂酸(Ⅱ)的CHCl_3溶液按不同摩尔比Ⅱ:Ⅱ=1:a(a=1,2,4,8,12)混合后,a≥2时,其π-A曲线比单一的标题配合物的有明显改善。Ⅰ:Ⅱ=1:4时,在亲水石英基片上制备了Z型LB膜,并用紫外光谱、荧光光谱和小角X射线衍射进行了表征。Surface pressure-area isotherm(π-A) behaviour of the mixture of metal complex hexadecyl pyridinium tetrakis(α-thenoyltrifluoroacetone) europium[C5H3NC16H33Eu(TTA)4] (Ⅰ) and stearic acid( Ⅱ ) with the molar ratio 1:1,1:2,1:4,1:8 and 1 : 12 was investigated. The experimental zero-pressure molecular areas obtained from different molar ratio are well consistent with the calculated ones according to the equation of Acakd= 55i/(i+j)+22j/(i+j), where i/(i+j), j/(i+j) are molar fraction of Ⅰ and Ⅱ, 55 and 22 are molecular areas of I and I respectively. Z-type Langmuir-Blodgett film from a mixture of Ⅰ :Ⅱ = 1: 4 was deposited on quartz plate at the surface pressure of 20 mN/m and studied by using UV, fluorescence spectrometry and low angle X-ray diffractometry.UV spectrum of the film peaked at 220, 232, 264 and 328 nm, which is similar to those of chloroform solution of the complex. However, the relative strength ratio of each peak changed and both peaks at 264 and 328 nm are somewhat blue shift comparing with that obtained from chloroform solution , it may be due to the order of the molecular arrangment in the film. Fluorescence spectrum of the film shows the three characteristic peaks of Eu(Ⅲ) complex, locating at 594, 613. 5, and 652 nm which is corresponding to magnetic dipole transition 5D0→7F1, induced electronic dipole transition 5D0 →7K2 and 5D0→7F3 transition, while those for powder complex appear at 594, 612 and 666 nm, respectively. Low angle X-ray diffraction results in four Bragg peaks, and based on these data the film thickness per layer 4. 27 nm is calculated.

关 键 词：铕配合物 LB膜 表征 光谱 四(α-噻吩甲酰三氟丙酮)合铕(Ⅲ)酸十六烷基吡啶 

分 类 号：O614.338[理学—无机化学] O484[理学—化学]