Fig. 5. First-order plots for the photooxidation of Trp (20 μM) photosensitized by (A) TCP (■) and TCP in presence of β-carotene (□), (B) TCP-C₆₀ (▲) and TCP-C₆₀ in presence of β-carotene (△) and (C) TCP-C₆₀⁴⁺ (▼) and TCP-C₆₀⁴⁺ in presence of β-carotene (▽) in DMF; λ_irr = 562 nm.