N-[5-Hydroxy-8-[[2-(methylsulfonyl)-4-nitrophenyl]azo]-1-naphthalenyl-1,3-benzenedisulfonamide, conjugate base Singlet oxygen

Merkel, P.B.; Smith, W.F.,Jr.
J. Phys. Chem. 83, 2834-2840 (1979)

Reaction: N-[5-Hydroxy-8-[[2-(methylsulfonyl)-4-nitrophenyl]azo]-1-naphthalenyl-1,3-benzenedisulfonamide, conjugate base + ¹O₂^* ® physical quenching
Solvent: DMF

k_quen = 5.6 × 10⁷(mol L^-1)

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements

Photosensitizer = Rose Bengal dianion; used solvent k_d = 7.1 × 10⁴ s^-1. Includes possible back energy transfer; k_prod. = 9.3 × 10⁶ L/(mol·s) derived using singlet oxygen quantum yield = 0.4; soln. contains NH₄OH.

Merkel, P.B.; Smith, W.F.,Jr.
J. Phys. Chem. 83, 2834-2840 (1979)

Reaction: N-[5-Hydroxy-8-[[2-(methylsulfonyl)-4-nitrophenyl]azo]-1-naphthalenyl-1,3-benzenedisulfonamide, conjugate base + ¹O₂^* ® products
Solvent: H₂O

k_react = 1.3 × 10⁸(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements

Self-sensitized; used solvent k_d = 3.3 × 10⁵ s^-1; used singlet oxygen quantum yield = 1.3 × 10^-4; soln. contains NH₄OH.

Merkel, P.B.; Smith, W.F.,Jr.
J. Phys. Chem. 83, 2834-2840 (1979)

Reaction: N-[5-Hydroxy-8-[[2-(methylsulfonyl)-4-nitrophenyl]azo]-1-naphthalenyl-1,3-benzenedisulfonamide, conjugate base + ¹O₂^* ® physical quenching
Solvent: CH₃OH

k_quen = 7.2 × 10⁷(mol L^-1)

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements

Self-sensitized; used solvent k_d = 1.3 × 10⁵ s^-1; k_q includes possible back energy transfer; k_prod. = 4.8 × 10⁶ L/(mol·s) derived using singlet oxygen quantum yield = 1.6 × 10^-3; soln. contains NH₄OH.