影像科学与光化学 ›› 2000, Vol. 18 ›› Issue (2): 188-192.DOI: 10.7517/j.issn.1674-0475.2000.02.188

• 研究简报 • 上一篇    

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

朱麟勇, 童晓峰, 李妙贞, 王尔鉴   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:2000-03-03 修回日期:2000-03-20 出版日期:2000-05-20 发布日期:2000-05-20
  • 通讯作者: 朱麟勇
  • 基金资助:
    国家重点基础研究发展规划项目G1999022503资助

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

Zhu Lin-yong, Tong Xiao-feng, Li Miao-zhen, Wang Er-jian   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:2000-03-03 Revised:2000-03-20 Online:2000-05-20 Published:2000-05-20

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.

关键词: 树枝体线性体嵌段共聚物, 天线效应, Tb3+, 发光增强

Abstract: The luminescence of Tb3+ ion bound to supramolecular aggregates of amphiphilic copolymers PAANa-Dendr.PE was investigated.Luminescence intensity of Tb3+ 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 T1 of phenyl benzyl ether dendrimer to the ground state of the lanthanide ion along with the linear chain of PAANa.

Key words: dendritic-linear block copolymers, antenna effect, Tb3+ ion, luminescence enhancement

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