Fig. 3: Optical characterization by steady-state and time-resolved spectroscopy.
From: Generating extended foldamer dye stacks and unravelling their evolving exciton dynamics
a, Steady-state absorption and emission (coloured) spectra of PBI‑1 to PBI‑14 recorded in Tol with their relative fluorescence quantum yields of the ME state (ΦFL (ME)), (total fluorescence quantum yield can be higher in Tol, Supplementary Table 3). Important absorption (Abs0–0, blue; AbsCT, red) and emission (FLLE, FLME, grey) bands are marked with arrows. b, ns-TF spectra of PBI-2 (top), PBI-6 (middle) and PBI‑14 (bottom) in Tol with temporal traces as insets, using a 520 nm pump pulse. The decay lines were fitted by a single exponential. The spectra at 1 ns are within instrumental response function (~3 ns). c, fs‑TA EAS of PBI-2 (top), PBI-6 (middle) and PBI‑14 (bottom) in Tol, using a 520 nm pump pulse. Corresponding steady-state spectra are inverted with filled curves (grey). mOD, milli-optical density.
