利用层接层自组装法技术,制备了“稀土多金属氧酸盐/聚酰胺-胺树形分子”无机/有机纳米荧光薄膜[Tb(P2Mo17O61)2/PAMAM]n,利用紫外-可见光谱(UV-Vis)、X 射线光电子能谱(XPS)、原子力显微镜(AFM)、荧光光谱对所制备的薄膜进行了组成、结构和性能的表征。研究结果表明,无机和有机组分通过静电作用成膜,复合膜的增长是线性均一、层层增长的过程,复合膜表面是由粒径较为均匀的球状粒子分布而成。与固体 Tb(P2Mo17O61)2相比,复合膜的荧光激发光谱出现了一宽的配体-金属电荷跃迁峰,发射光谱不但体现了稀土元素 Tb3+的特征发射,且 Tb3+劈裂出一新的发射峰,新峰的出现是由于 Tb3+所处的晶体场的对称性减弱引起的。
The inorganic/organic luminescent nanocomposite film based on polyoxometalate anion [Tb (P2 Mo17 O61 )2 ]17-and polyamidoamine (PAMAM)dendrimer was prepared by layer-by-layer technology.The components,structures and properties of the film were characterized by UV-Vis,XPS,AFM and fluorescence spectroscopy.The results showed that electrostatic interaction exists between inorganic and organic compo-nents.The growth processes of the assembled film were quantitative and highly reproducible from layer to lay-er.The surface was smooth and dispersed with uniform spherical particles.Compared with the solid Tb (P2 Mo17 O61 )2 ,the excitation spectrum of Tb (P2 Mo17 O61 )2/PAMAM film showed a board ligand to metal charge transfer band.The film exhibited the characteristic emission peaks of Tb3+.In addition,a new peak ap-peared in the emission spectra,which may result from the lower symmetry of Tb3+ crystalline field in the film.
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