Alternating conjugated and transannular chromophores: tunable property of fluorene-paracyclophane copolymers via transannular pi-pi interaction.
Alternating conjugated and transannular chromophores: tunable property of fluorene-paracyclophane copolymers via transannular pi-pi interaction.
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DOI：
10.1021/ol034413r
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发表时间：
2003-08
期刊：
影响因子：
5.2
通讯作者：
Weiling Wang;Jianwei Xu;Y. Lai
中科院分区：
文献类型：
--
作者：
Weiling Wang;Jianwei Xu;Y. Lai
以合适的前驱体为原料，通过Suzuki偶联反应合成了一系列芴-二芴[3.3]对环己烷共聚物。跨环pi-pi相互作用显著改变了聚合物主链的电子和光学性质。在未取代聚合物的发射光谱中有较大的红移，同时光致发光（PL）效率也有所提高。环烷单元中的取代导致PL猝灭。
[structure-see text]A series of fluorene-dithia[3.3]paracyclophane copolymers was synthesized by Suzuki coupling reactions of suitable precursors. Transannular pi-pi interactions altered the electronic and optical properties of the polymer backbone significantly. A large red shift in the emission spectrum of the unsubstituted polymer was accompanied by enhanced photoluminescence (PL) efficiency. Substitution in the cyclophane unit resulted in PL quenching.