Oxide radical ion 1,8-Dihydroxy-9,10-anthraquinone dianion

Pal, H.; Palit, D.K.; Mukherjee, T.; Mittal, J.P.
J. Chem. Soc., Faraday Trans. 88, 681-687 (1992)

Reaction: O·^- + 1,8-Dihydroxy-9,10-anthraquinone dianion + H⁺ ® OH^- + 1,8-AQ(O^-)(O·)
Solvent: H₂O

k = 5.0 × 10⁹(L mol^-1 s^-1), pH = 14

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly

Product buildup kinetics at >650 nm in N₂O-satd. soln.

Pal, H.; Palit, D.K.; Mukherjee, T.; Mittal, J.P.
J. Chem. Soc., Faraday Trans. 87, 1109-1116 (1991)

Reaction: O·^- + 1,8-Dihydroxy-9,10-anthraquinone dianion ® O^2- + 1,8-AQ(O^-)(O·)
Solvent: H₂O

k = 5 × 10⁹(L mol^-1 s^-1), pH ~14

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly

Product buildup kinetics at 482 nm in N₂O-satd. soln. contg. (5-10) × 10^-5 mol L^-1 quinone; pK_a = 9.7, 12.1.