Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport
Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport
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DOI：
10.1039/d0tc05553k
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发表时间：
2021-03-28
影响因子：
6.4
通讯作者：
Bronstein, Hugo
中科院分区：
文献类型：
--
作者：
Fallon, Kealan J.;Wijeyasinghe, Nilushi;Bronstein, Hugo
在此，我们提出了两个新的有机半导体聚合物合成从一个古老的染料。通过在聚合物主链内采用交叉共轭作为合成策略，我们能够设计光学间隙，使得新材料在整个可见光谱内吸收。交叉共轭聚合物在有机场效应晶体管中表现出相对高的n型电荷传输性能，这是这种类型的聚合物的罕见特性。量子化学计算提供了深入了解这种行为，这表明，虽然共轭沿着HOMO确实是通过分子设计抑制，这些材料具有高度离域LUMO，促进高n型电荷传输。
Herein, we present two novel organic semiconducting polymers synthesised from an ancient dye. By employing cross-conjugation within the polymer backbone as a synthetic strategy, we are able to engineer optical gaps such that the novel materials absorb over the entire visible spectrum. The cross-conjugated polymers exhibited relatively high n-type charge transport performance in organic field-effect transistors, a rare characteristic for this type of polymer. Quantum chemical calculations provide insight into this behaviour, suggesting that, whilst conjugation along the HOMO is indeed inhibited via molecular design, these materials possess highly delocalized LUMOs, facilitating high n-type charge transport.