1,8-Dihydroxy-9-anthrone, conjugate base Singlet oxygen

Mueller, K.; Kanner, R.C.; Foote, C.S.
Photochem. Photobiol. 52, 445-450 (1990)

Reaction: 1,8-Dihydroxy-9-anthrone, conjugate base + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 3.1 × 10⁸(L mol^-1 s^-1), b = 5.9 × 10^-5(mol L^-1), T = 295K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements
Excitation wavelength: 355 or 532 nm

Photosensitizer = Rose Bengal dianion; used solvent k_d = 1.8 × 10⁴ s^-1. [Sensitizer] = 2 × 10^-5 (mol L^-1). [Indicator] = 5.69-23.48 × 10^-5 (mol L^-1). [O₂] = O₂.

Mueller, K.; Kanner, R.C.; Foote, C.S.
Photochem. Photobiol. 52, 445-450 (1990)

Reaction: 1,8-Dihydroxy-9-anthrone, conjugate base + ¹O₂^* ® products
Reference Reaction: (CH₃)₂C=C(CH₃)₂ + ¹O₂^* ®
Solvent: CH₃CN

k/k_reference = 6
k_react = 2 × 10⁸(L mol^-1 s^-1), k_reference = 3.0 × 10⁷(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 355 or 532 nm

Photosensitizer = Rose Bengal dianion. Added solute (2-4)e-2. [Sensitizer] = 2 × 10^-5 (mol L^-1). [Indicator] = 9.72-12.82 × 10^-5 (mol L^-1). [O₂] = O₂.

Mueller, K.; Kanner, R.C.; Foote, C.S.
Photochem. Photobiol. 52, 445-450 (1990)

Reaction: 1,8-Dihydroxy-9-anthrone, conjugate base + ¹O₂^* ® products and/or physical quenching
Solvent: D₂O

k = 3 × 10⁸(L mol^-1 s^-1), pH = 9.4-11.4

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 or 532 nm

Photosensitizer = Rose Bengal dianion. [O₂] = O₂.