Polarizing Energy Transfer in Photoluminescent Conjugated Polymers with Covalently Attached Sensitizers
Polarizing Energy Transfer in Photoluminescent Conjugated Polymers with Covalently Attached Sensitizers
复制标题
具有共价连接敏化剂的光致发光共轭聚合物中的偏振能量转移
DOI：
10.1021/ma990183d
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
C. Weder
中科院分区：
文献类型：
--
作者：
A. Palmans;Paul S. Smith;C. Weder
制备了一类新型聚对亚苯基乙炔基 (PPE) 聚合物 COU-OPPE 和 ANT-OPPE，其中香豆素基和蒽基敏化剂分子通过柔性间隔基共价连接到共轭聚合物主链。在这些聚合物的稀溶液中，观察到从敏化剂部分到 PPE 主链的有效共振能量转移，导致 PPE 大分子的发光增强。此外，当作为客体掺入定向聚乙烯薄膜中时，新型聚合物 COU-OPPE 和 ANT-OPPE 表现出从悬垂敏化剂到 PPE 主链的有效能量转移。特别是在 ANT-OPPE 的情况下，我们发现 PPE 主链有效取向，而蒽部分基本上保持各向同性，这导致该系统具有高度的极化能量转移。
A new class of poly(p-phenyleneethynylene) (PPE) polymers, COU-OPPE and ANT-OPPE, have been prepared, in which coumarin- and anthracene-based sensitizer molecules are covalently linked to the conjugated polymer backbone via a flexible spacer. In dilute solutions of these polymers, efficient resonance energy transfer is observed from the sensitizer moieties to the PPE backbone, resulting in enhanced luminescence of the PPE macromolecules. Also, when incorporated as guests in oriented polyethylene films, the novel polymers, COU-OPPE and ANT-OPPE, show efficient energy transfer from the pendent sensitizer to the PPE backbone. Especially in the case of ANT-OPPE, we found that the PPE backbone is efficiently oriented while the anthracene moiety remains essentially isotropic, which results in a high degree of polarizing energy transfer for this system.