化学学报 ›› 2001, Vol. 59 ›› Issue (3): 339-343. 上一篇    下一篇

研究论文

双长链烷基稀土杂多酸化合物LB膜的制备、结构及性质研究

柳士忠;张贞文;王俊;杜祖亮;戴树玺   

  1. 湖北大学化学与材料科学学院;河南大学固体表面实验室
  • 发布日期:2001-03-15

Studies on the preparation, structure and properties of dilong-chain AlK~yl group rare earth heteropoly compounds LB films

Liu Shizhong;Zhang Zhenwen;Wang Jun;Du Zuliang;Dai Shuxi   

  • Published:2001-03-15

制备了三种新型双窗长链烷基稀土杂多酸化合物langmuir和langmuir-blodgett膜:DODA/Ln(PW~1~1)~2(Ln=La,Sm,Eu)。用π-A等温线,IR,UV,小角X射线衍射,荧光光谱,光电压谱对其进行了表征。结果表明:它们在空气-水界面有良好的成膜性能,这些单层在表面压为零时,表观单分子占有面积为0.45~0.50nm^2。LB膜有良好的层间有序性,稀土杂多酸阴离子是作为一无机层夹在两个双长链烷基层之间。DODA/Ln(PW)~1~1)~2LB膜具有Sm,Eu的特征荧光,其光电压谱亦有较强的光电响应。

关键词: 杂多酸, 稀土, L-B膜, 季铵, 红外分光光度法, 紫外分光光度法, X射线小角散射分析, 湖北省自然科学基金

Langmuir and Langmuir-Blodgett films of three new rare earth heteropoly compounds with long-chain alkyl gruops DODA/Ln(PW~1~1)~2 (Ln=La, Sm, Eu) were prepared and characterized by π-A isotherm, FT IR spectra, UV-vis absorption spectra, low-angle X-ray diffraction (LAXD), fluorescence spectra and surface photovoltage spectroscopy (SPS). The results show that they have good films-forming property on air/water interface. The molecular areas for these monolayers at zero pressure are estimated to be 0.45~0.50 nm^2. LB films have the good interlayer order, rare earth heteropoly anions are sandwiched between dilongchain alkyl groups as an inorganic layer. DODA/Ln(PW)~1~1)~2LB films have characteristic fluorescene-cemission spectrum of Sm and Eu, surface photovoltage spectroscopy has stronger photoelectric response.

Key words: HETEROPOLYACID, RARE EARTH, L-B MEMBRANE, QUATERNARY AMMONIUM COMPOUNDS, INFRARED SPECTROPHOTOMETRY, ULTRAVIOLET SPECTROPHOTOMETRY, X-RAY SMALL ANGLE SCATTERING ANALYSIS

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