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Absorption (dotted lines, panels A–C) and fluorescence emission (solid lines, panels D–F) spectra of COUPY fluorophores 1–6 in MeOH (top panels), ACN (middle panels), and DCM (bottom panels). Legend: COUPY 1 (purple –), 2 (blue –), 3 (brown –), 4 (orange –), 5 (green –), and 6 (red –).
