Urate ion Singlet oxygen

Kanofsky, J.R.
Photochem. Photobiol. 51, 299-303 (1990)

Reaction: Urate ion + ¹O₂^* ® products and/or physical quenching
Solvent: D₂O

k = 3.6 × 10⁸(L mol^-1 s^-1), pH = 7.4, T = 298K

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

Photosensitizer = 5,10,15,20-Tetrakis(1-methylpyridinium-4-yl)porphine. [Sensitizer] = 4.4 × 10^-5 (mol L^-1).

Dahl, T.A.; Midden, W.R.; Hartman, P.E.
Photochem. Photobiol. 47, 357-362 (1988)

Reaction: Urate ion + ¹O₂^* ® products
Reference Reaction: 2,5-Bis(hydroxymethyl)furan + ¹O₂^* ®
Solvent: H₂O

k/k_reference = 1.0
pH = 7.0, T = 283K

Experimental method: Photolysis
Analytical method: HPLC
Data type: Relative value measured by steady state method

Photosensitizer = Rose Bengal dianion; meas. k/k_ref = 1.0; sensitizer immobilized on glass beads. Added solute 10^-3. [Sensitizer] = 10^-5 (mol L^-1). [Indicator] = 10^-4 (mol L^-1).

Dahl, T.A.; Midden, W.R.; Hartman, P.E.
Photochem. Photobiol. 47, 357-362 (1988)

Reaction: Urate ion + ¹O₂^* ® products
Reference Reaction: 2,5-Bis(hydroxymethyl)furan + ¹O₂^* ®
Solvent: H₂O

k/k_reference = 5.0 × 10^-1
pH = 7.0, T = 283K

Experimental method: Photolysis
Analytical method: HPLC
Data type: Relative value measured by steady state method

Photosensitizer = Rose Bengal dianion. meas. k/k_ref = 0.40. Added solute 5 × 10^-4. [Sensitizer] = 10^-5 (mol L^-1). [Indicator] = 10^-4 (mol L^-1).