A cyano-based electron-accepting building block to design n-type conjugated polymers with absorption wavelength of >1000 nm,Chemical Communications

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A cyano-based electron-accepting building block to design n-type conjugated polymers with absorption wavelength of >1000 nm
Chemical Communications ( IF 4.9 ) Pub Date : 2023-01-13 , DOI: 10.1039/d2cc06626b
Yinghui Wang _{1,

2} , Bin Meng ₁ , Jian Liu _{1,

2} , Feng Zhu _{1,

2} , Chuanjiang Qin _{1,

2} , Jun Liu _{1,

2} , Lixiang Wang _{1,

2}

Affiliation

There are much fewer n-type conjugated polymers than p-type counterparts because of the lack of strong electron-accepting building blocks. We report a novel strong electron-accepting unit based on a dicyanomethylene unit. The resulting polymers exhibit LUMO energy levels of as low as −4.04 eV and narrow optical gaps with an onset absorption wavelength of 1050 nm. Moreover, the polymers exhibit near-infrared light absorption with good photostability because of their low-lying LUMO/HOMO energy levels.

中文翻译：

一种基于氰基的电子接受结构单元，用于设计吸收波长 >1000 nm 的 n 型共轭聚合物

由于缺乏强电子接受结构单元，n 型共轭聚合物比 p 型对应物少得多。我们报告了一种基于二氰亚甲基单元的新型强电子接受单元。所得聚合物的 LUMO 能级低至 -4.04 eV，光学间隙窄，起始吸收波长为 1050 nm。此外，由于其低 LUMO/HOMO 能级，聚合物表现出近红外光吸收和良好的光稳定性。

更新日期：2023-01-13

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