Oligo(3,6-phenanthrene ethynylenes): Synthesis, Characterization, and Photoluminescence
Oligo(3,6-phenanthrene ethynylenes): Synthesis, Characterization, and Photoluminescence
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寡聚（3,6-菲亚乙炔基）：合成、表征和光致发光
DOI：
10.1021/jo302825r
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发表时间：
2013-04-05
影响因子：
3.6
通讯作者：
Wang, Yanguang
中科院分区：
文献类型：
--
作者：
Li, Jichao;Hu, Gongfang;Wang, Yanguang
合成了一系列高荧光的寡聚（3，6-菲乙炔）（F1-F7），并系统地研究了它们的物理化学行为。它们发出的光具有高发射量子产率，高达0.92。这些化合物的发射波长依赖于存在于低聚物中的菲嵌段的数量。随着菲的数量增加，观察到红移的排放。在理论计算的基础上，F4-F7可以形成螺旋结构，这表明F4-F7的激基缔合物发射可能是由于菲在螺旋结构中的分子内π-π堆积。然而，激基缔合物发射仅观察到F5-F7在稀环己烷和F6和F7在稀二氯甲烷中，分别。由于溶剂化程度的原因，在稀四氢呋喃中没有观察到F4-F7的激基缔合物发射。
A series of highly fluorescent, oligo(3,6-phenanthrene ethynylenes) (F1-F7) were synthesized, and their photophysical behavior was systematically investigated. They emitted light with highly emissive quantum yields, up to 0.92. Emissive wavelengths of these compounds relied on the number of phenanthrene blocks existing in the oligomers. Red-shifted emissions were observed as the number of phenanthrenes increased. On the basis of theoretical calculations, helical structures could be formed for F4-F7, indicating that the excimer emissions might be observed for F4-F7 due to the intramolecular pi-pi stackings of phenanthrenes in the helical structures. However, excimer emissions were only observed for F5-F7 in dilute cyclohexane and for F6 and F7 in dilute methylene chloride, respectively. No excimer emission was observed for F4-F7 in dilute tetrahydrofuran due to the degree of solvation.