嵌段共聚物PAANa-Dendr.PE聚集体超分子结构中树枝体对铽离子发光增强的天线效应研究  

ANTENNA EFFECT ON THE LUMINESCENCE ENHANCEMENT OF Tb3+ ION IN SUPRAMOLECULAR AGGREGATES OF BLOCK COPOLYMERS PAANa-Dendr.PE

作　　者：朱麟勇[1] 童晓峰[1] 李妙贞[1] 王尔鉴[1] 

机构地区：[1]中国科学院感光化学研究所,北京100101

出　　处：《感光科学与光化学》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

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.

关 键 词：树枝体 嵌段共聚物 发光增强 铽离子 PAANa 结构 

分 类 号：O644[理学—物理化学]