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. 2021 Aug 5;4:116. doi: 10.1038/s42004-021-00553-8

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© The Author(s) 2021

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Fig. 5 — a Tetrahedron-to-helicate transformation from [Eu₄L1₆] to [Eu₂L1₃] (4.53 × 10⁻⁴ M in CD₃CN). [Eu₄L1₆] slowly rearranged back to [Eu₂L1₃] after dilution in CD₃CN for 11 days. b Tetrahedron-to-helicate transformation from [Sm₄L1₆] to [Sm₂L1₃] (4.12 × 10⁻⁴ M in CD₃CN) (bottom) upon dissolution in CD₃CN. [Sm₄L1₆] slowly rearranged back to [Sm₂L1₃] after dilution in CD₃CN for 14 days.