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. 2023 Apr 18;39(8):1307–1316. doi: 10.1007/s44211-023-00340-6

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© The Author(s) 2023

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Fig. 3 — a Job plot of Eu(III)-(3-NTA) system at λ_ex/em = 333/615 nm in methanol at room temperature [Eu(III)] = [3-NTA] = 1 × 10^–4 M b The hypothesized structure of the Eu (III)–(3-NTA)₃ complex in methanol