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. 2024 Oct 9;25(19):10831. doi: 10.3390/ijms251910831

Figure 4.

Figure 4

UV–visible spectra for the titration of bis-TCH with Cu(II) in aqueous solution at pH 7.4 (25 mM HEPES buffer; CL = 17 µM; Cu(II):L = 0–3). Inset: plot of the observed absorbance values at 333 nm vs. Cu(II)/ligand molar ratio.