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利用溶胶 凝胶法将稀土配合物Eu(TTA) 3 组装到MCM 41介孔分子筛的孔道中 ,并初步认定客体分子Eu(TTA) 3 是以加合物形式包裹于表面活性剂胶束中。该法制得的介孔复合体Eu(TTA) 3/MCM 41,用XRD、HRTEM技术证实具有短程有序的、规整的六方介孔结构和大小分布均匀的纳米晶粒。对其光致发光和荧光寿命的研究发现 :与乙醇溶液中相比 ,Eu3 +的荧光寿命没有发生改变 ,但Stokes位移却明显增大 ;复合体中 ,能量是从主体MCM 41传递到客体Eu(TTA) 3 上。
Eu (TTA) 3 was assembled into the pores of MCM 41 mesoporous molecular sieves by sol-gel method. It was initially determined that the guest molecule Eu (TTA) 3 was encapsulated in surfactant micelles as an adduct. The mesoporous composite Eu (TTA) 3 / MCM 41 prepared by this method has been confirmed by XRD and HRTEM techniques to have a short-range ordered, ordered hexagonal mesoporous structure and nanocrystalline grains with uniform size distribution. The results of photoluminescence and fluorescence lifetime showed that the fluorescence lifetime of Eu3 + did not change compared with ethanol solution, but the Stokes shift obviously increased. In the complex, energy was transferred from host MCM 41 to guest Eu (TTA) 3.