By modulating halogen substituents, two novel three-component crown ether complexes: [(3-chloro-2-fluorobenzylamine)(15-crown-5)][ClO4] (1) and [(2,3-difluoro benzylamine)(15-crown-5)][ClO4] (2) were prepared, in which 1 exhibits a 90 K higher phase transition temperature than 2, with switchable second harmonic generation (SHG) effects and ferroelectricity.
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F. Liu, Y. Wu, G. Chen, G. Yan, X. Li and Z. Wei, Chem. Commun., 2025, Accepted Manuscript , DOI: 10.1039/D5CC04125B
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