New Types of Fluorescent Polymers with Bis- Silicon-Bridged p-Terphenyl as a Building Unit
New Types of Fluorescent Polymers with Bis- Silicon-Bridged p-Terphenyl as a Building Unit
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DOI：
10.1002/macp.200900110
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发表时间：
2009-07
影响因子：
2.5
通讯作者：
Liangchun Li;Caihong Xu;Shuhong Li
中科院分区：
文献类型：
--
作者：
Liangchun Li;Caihong Xu;Shuhong Li
以6,12-二氢-6,12-二甲基-6,12-二苯胺[1,2-b]芴(2)为关键单体，通过硅氢化反应合成了一系列主链上含有双硅桥对苯骨架的新型聚合物。研究了它们的光物理和热性能，并与相关单体和模型化合物进行了比较。所有聚合物相对于小分子都表现出更好的热稳定性。在稀溶液中，由双硅桥对terphenyl和饱和单元交替构成的聚合物具有恒定的最大发射波长和荧光量子产率，与单体2相当，而在双硅桥对terphenyl单元之间具有不饱和连接的聚合物具有低的荧光量子产率和红移的最大发射波长。
A series of novel polymers containing a bis-silicon-bridged p-terphenyl skeleton in the main chain is synthesized using hydrosilylation reactions with 6,12-dihydro-6,12-dimethyl-6,12-disilaindeno[1,2-b]fluorene (2) as the key monomer. Their photophysical and thermal properties are investigated and compared with those of the related monomer and model compounds. All polymers show an improved thermal stability with respect to the small molecules. In dilute solutions, the polymers constructed with alternate bis-silicon-bridged p-terphenyl and saturated unit show constant emission maximum wavelengths and fluorescence quantum yields, comparable to those of monomer 2, while the polymer having an unsaturated linkage between the bis-silicon-bridged p-terphenyl units exhibits a low fluorescence quantum yield with a red-shifted emission maximum wavelength.