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- W4313505546 abstract "A naphthalene imide (1) and a naphthalene (2) bearing two pyrrole units have been synthesized, respectively, as anion receptors. It was revealed by 1H NMR spectral studies carried out in CD3CN that receptors 1 and 2 bind various anions via hydrogen bonds using both C-H and N-H donors. Compared with receptor 2, receptor 1 shows higher affinity for the test anions because of the enhanced acidity of its pyrrole NH and naphthalene CH hydrogens by the electron-withdrawing imide substituent. Molecular mechanics computations demonstrate that the receptors contact the halide anions via only one of the two respective available N-H and C-H donors whereas they use all four donors for binding of the oxyanions such as dihydrogen phosphate and hydrogen pyrophosphate. Receptor 1, a push-pull conjugated system, displays a strong fluorescence centered at 625 nm, while receptor 2 exhibits an emission with a maximum peak at 408 nm. In contrast, upon exposure of receptors 1 and 2 to the anions in question, their fluorescence was noticeably quenched particularly with relatively basic anions including F−, H2PO4−, HP2O73−, and HCO3−." @default.
- W4313505546 created "2023-01-06" @default.
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- W4313505546 date "2022-12-22" @default.
- W4313505546 modified "2023-10-14" @default.
- W4313505546 title "Molecular Pincers Using a Combination of N-H and C-H Donors for Anion Binding" @default.
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- W4313505546 doi "https://doi.org/10.3390/ijms24010163" @default.
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