Deactivation of singlet oxygen by single-wall carbon nanohorns

Single-wall carbon nanohorns (SWNHs) have significant deactivation properties of singlet oxygen 1O2. The estimated 1O2 deactivation rate constant of the SWNHs, 8 × 104 [L g−1 s−1], was larger than the physical quenching rate constant of α-Tocopherol, 0.9 × 104 [L g−1 s−1], a well-known antioxidant.