Fig. 5: Experimental and computational verification of anti-Kasha emission.

a Excitation spectra of SCPP[10] from emissions monitored at 390 nm (green dotted line), at 470 nm, and at 520 nm (blue dotted line); absorption spectrum of SCPP[10] (purple solid line). b Excitation spectra of SCPP[10,9] from emissions monitored at 394 nm (green dotted line), at 472 nm, and at 528 nm (blue dotted line); absorption spectrum of SCPP[10,9] (purple solid line). c Excitation spectra of SCPP[10,8] from emissions monitored at 392 nm (green dotted line), at 467 nm, and at 545 nm (blue dotted line); absorption spectrum of SCPP[10,8] (purple solid line). d TDDFT-calculated molecular orbitals and energy diagrams. The f value represents the oscillator strength. e Jablonski diagram showing the calculated photophysical processes of SCPP[10,8]. k_IC internal conversion rate, k_r radiative transition rate, ∆G energy gap between two excited states.