【摘要】 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。更多还原

【Abstract】 The inorganic/organic luminescent nanocomposite film based on polyoxometalate anion [Tb(P2Mo17O61)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 components.The growth processes of the assembled film were quantitative and highly reproducible from layer to layer.The surface was smooth and dispersed with uniform spherical particles.Compared with the solid Tb(P2Mo17O61)2,the excitation spectrum of Tb(P2Mo17O61)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 appeared in the emission spectra,which may result from the lower symmetry of Tb3+ crystalline field in the film.更多还原