New pyrrolo[3,2-b]pyrrole derivatives with multiple-acceptor substitution: Efficient fluorescent emission and near-infrared two-photon absorption |
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| Authors: | Huan Liu Jun Ye Yu Zhou Lulu Fu Qinghua Lu Chi Zhang |
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| Institution: | 1. China-Australia Joint Laboratory for Functional Molecules and Ordered Matter, School of Chemistry Science and Engineering, Tongji University, Shanghai 200092, PR China;2. School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, PR China |
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| Abstract: | Two new D-π-A organic chromophores, 1,2,4,5-tetra(4-cyanophenyl)pyrrolo3,2-b]pyrrole (4CNPP) and 1,2,3,4,5,6-hexa(4-cyanophenyl)pyrrolo3,2-b]pyrrole (6CNPP), were developed by modifying the electron-rich pyrrolo3,2-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 Фfs of 88–90% in toluene, as well as impressive two-photon absorption cross-sections at the near-infrared (NIR) 700?nm. |
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| Keywords: | Donor-π-acceptor Fluorescence Two-photon absorption |
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