Two new D-π-A organic chromophores, 1,2,4,5-tetra(4-cyanophenyl)pyrrolo[3,2-b]pyrrole (4CNPP) and 1,2,3,4,5,6-hexa(4-cyanophenyl)pyrrolo[3,2-b]pyrrole (6CNPP), were developed by modifying the electron-rich pyrrolo[3,2-b]pyrrole (PP) unit with four and six 4-cyanophenyls respectively. The compounds exhibited bright blue emissions in low- to high-polarity solvents, with high Ф_fs of 88–90% in toluene, as well as impressive two-photon absorption cross-sections at the near-infrared (NIR) 700 nm.

中文翻译：

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具有多受体取代的新型吡咯并[3,2- b ]吡咯衍生物：高效荧光发射和近红外双光子吸收

两种新的D-π-A有机发色团1,2,4,5-四（4-氰基苯基）吡咯并[3,2- b ]吡咯（4CNPP）和1,2,3,4,5,6-六（4-氰基苯基）吡咯并[3，2- b ]吡咯（6CNPP）是通过分别用四个和六个4-氰基苯基修饰富含电子的吡咯并[3，2- b ]吡咯（PP）单元而开发的。化合物中的低到高极性溶剂表现出明亮的蓝色的排放量，具有高Ф _˚F在甲苯中的88-90％的S，以及在近红外（NIR）令人印象深刻的双光子吸收横截面的700纳米。