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- W4307304013 abstract "Most solid-state imine-linked covalent organic frameworks (COFs) are non-fluorescent due to aggregation-caused quenching because of strong π-π interactions and rotationally unstable imine bonds in the stacked layers of COFs. Here, we report a green-emitting fluorescent imine-based COF (ODA-TP-COF) by integrating flexible building blocks and transforming the COF into nanoscale sheets. Due to the existence of flexible non-planar units, the interlayer distance of ODA-TP-COF increases, which weakens the π-π interaction and thus reduces the aggregation-caused fluorescence quenching. Our further study found that the ODA-TP-COF dispersed in different solvents has different fluorescence properties, and surprisingly when methanol was used as the solvent for ODA-TP-COF, the presence of a small biological molecule, folic acid, could significantly and selectively induce a blue-shifts of ODA-TP-COF fluorescence peak. It is the first time that the ODA-TP-COF could serve as a highly selective fluorescent probe for the visual detection of folic acid." @default.
- W4307304013 created "2022-10-31" @default.
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- W4307304013 date "2023-01-01" @default.
- W4307304013 modified "2023-10-17" @default.
- W4307304013 title "A green-emitting fluorescent covalent organic framework nanostructure for visual sensing of folic acid" @default.
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- W4307304013 doi "https://doi.org/10.1016/j.dyepig.2022.110878" @default.
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