fig2

Figure 2. (A) UV-Vis spectra of LA, LB, SA, and SB in DMSO (λ_ex = 320 nm, c = 10.0 μM). (B) PL spectra of LA, LB, SA, and SB in DMSO (λ_ex = 320 nm, c = 10.0 μM). PL spectra of SA (C) and SB (D) recorded in DMSO/H₂O mixtures containing different H₂O fractions. The respective inserts show SA and SB dissolved in DMSO/H₂O with 0% (left) and 90% H₂O (right). Quantum yields of SA (E) and SB (F) versus increasing H₂O fractions in DMSO/H₂O mixtures, determined using rhodamine B (Φ_F = 69.0%) at 365 nm (λ_ex = 320 nm, c = 1.00 μM).