To reveal the photoexcited state dynamics of 1b and 1c dyads, transient absorption (TA) spectroscopy was employed. Figure shows the picosecond-nanosecond (ps-ns) and nanosecondmicrosecond (ns-μs) TA spectra and kinetics of selected spectral regions (inset) of 1c (a and c) and 1b (b and d) in toluene after photoexcitation at 505 nm (ps-ns TA) and 532 nm (ns-μs TA), respectively. The negative ΔT/T signals represent photoinduced absorption (PA), whereas the positive ΔT/T signals represent photo-bleaching (PB). In Figure , we can attribute the band centred at 500-510 nm to the PB of BODIPY. Stimulated emission can be observed in the PB broadening ∼550 nm, for PyrBDP 1b in toluene (see Figure ). The PA region of 1c at ∼420 nm corresponds to the tail of the anthracene exciton-induced absorption (Ant), observable in both toluene (Figure ) and acetonitrile (Figure ). The same can be seen for 1b in acetonitrile with a clear pyrene exciton-induced absorption (Pyr) signature at ∼460 nm readily visible at 1 -2 ps, but visible only at later times (100 -500 ps) in toluene (Figure ). The BODIPY exciton-induced absorption (BDP) can be seen at around 549-558 nm and 547-556 nm, for 1c and 1b, respectively, but only later for 1b in toluene (1 -5 ns) due to the overlap with its stimulated emission (Figure ).