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- W4233187612 abstract "Abstract Developing a universal strategy to design new piezochromic luminescent materials with desirable properties remains challenging. Here, we report that insertion of a non-emissive molecule into a donor (perylene) and acceptor (TCNB) binary cocrystal can realize fine manipulation of intermolecular interactions between perylene and TCNB for desirable piezochromic luminescent properties. A continuous pressure-induced emission enhancement up to 3 GPa and a blue shift from 655 nm to 619 nm have been observed in perylene-TCNB cocrystals upon THF insertion, in contrast to the red-shifted and quenched emission observed when compressing perylene-TCNB cocrystals and other cocrystals reported earlier. By combining experiment with theory, it is further revealed that the inserted non-emissive THF forms blue-shifted H-bonds with neighboring TCNB molecules and promote a conformation change of perylene molecules upon compression, causing the blue-shifted and enhanced emission. This strategy remains valid when inserting other molecules as non-emissive component into perylene-TCNB cocrystals for abnormal piezochromic luminescent behaviors. Our strategy could also be extended to other cocrystals with different donor-acceptor components, opening a new way for designing novel piezochromic luminescent materials for future applications." @default.
- W4233187612 created "2022-05-12" @default.
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- W4233187612 date "2021-02-25" @default.
- W4233187612 modified "2023-10-08" @default.
- W4233187612 title "Molecular insertion regulates the donor-acceptor interactions in cocrystals for the design of piezochromic luminescent materials" @default.
- W4233187612 doi "https://doi.org/10.21203/rs.3.rs-226341/v1" @default.
- W4233187612 hasPublicationYear "2021" @default.
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