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

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。

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

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.