摘要
本文研究了两亲嵌段共聚物PAANa Dendr.PE组成的超分子聚集体 ,对Tb3+离子的天线效应 .当PAANa Dendr .PE聚集体存在时 ,Tb3+的发光强度明显增强 .而且增强的幅度正比于树枝体的代数 .因此在PAANa Dendr.PE/Tb3+系统中 ,树枝体作为“光天线”对紫外光能的捕集 ,通过分子内能量传递 ,能量沿线性PAANa链从树枝体的三重态传递到Tb3+离子 .从而使得Tb3+的发光大幅度增强 .
The luminescence of Tb3+ ion bound to supramolecular aggregates of amphiphilic copolymers PAANa-Dendr.PE was investigated.Luminescence intensity of Tb 3+ ion is prominently increased in the presence of aggregates of PAANa-Dendr.PE. Furthermore,the higher generation dendron of the copolymer exhibits more intense luminescence of Tb3+ ion.These results indicate that in PAANa-Dendr.PE/Tb3+ systems,dendritic block acted as a light-harvesting “antenna";the intramolecular energy transfer process is from the triplet T_1 of phenyl benzyl ether dendrimer to the ground state of the lanthanide ion along with the linear chain of PAANa.
出处
《感光科学与光化学》
CSCD
2000年第2期188-192,共5页
Photographic Science and Photochemistry
基金
国家重点基础研究发展规划项目!G19990 2 2 5 0 3资助
关键词
树枝体
嵌段共聚物
发光增强
铽离子
PAANa
结构
dendritic-linear block copolymers
antenna effect
Tb3+ ion
luminescence enhancement
