1,4-Benzenediol Singlet oxygen

Mukai, K.; Itoh, S.; Daifuku, K.; Morimoto, H.; Inoue, K.
Biochim. Biophys. Acta 1183, 323-326 (1993)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: Ethanol

k = 1.4 × 10⁷(L mol^-1 s^-1), T = 308K

Experimental method: Chemical reaction
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Indicator = 1,3-Diphenylisobenzofuran; used solvent k_d = 8.3 × 10⁴ s^-1; ¹O₂* from MNPO₂.

Martire, D.O.; Braslavsky, S.E.; Garcia, N.A.
J. Photochem. Photobiol., A 61, 113-124 (1991)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products
Reference Reaction: 9,10-Dimethylanthracene + ¹O₂^* ®
Solvent: Acetonitrile

k_react = 5 × 10⁵(L mol^-1 s^-1), k_reference = 1.3 × 10⁸(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV emission
Data type: Relative value measured by steady state method

Photosensitizer = Mesoporphyrin IX, dimethyl ester.

Martire, D.O.; Braslavsky, S.E.; Garcia, N.A.
J. Photochem. Photobiol., A 61, 113-124 (1991)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: Acetonitrile

k = 2.8 × 10⁷(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = Rose Bengal dianion.

Martire, D.O.; Braslavsky, S.E.; Garcia, N.A.
J. Photochem. Photobiol., A 61, 113-124 (1991)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: D₂O

k = 2.9 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = Rose Bengal dianion.

Martire, D.O.; Braslavsky, S.E.; Garcia, N.A.
J. Photochem. Photobiol., A 61, 113-124 (1991)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products
Reference Reaction: DL-Histidine + ¹O₂^* ®
Solvent: Water

k_react = 2.5 × 10⁷(L mol^-1 s^-1), k_reference = 7 × 10⁷(L mol^-1 s^-1), T = 293K

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

Photosensitizer = Eosin dianion.

Tratnyek, P.G.; Hoigne, J.
Environ. Sci. Technol. 25, 1596-1604 (1991)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products
Reference Reaction: Furfuryl alcohol + ¹O₂^* ®
Solvent: H₂O

k_react ~ 4 × 10⁷(L mol^-1 s^-1), k_reference = 1.2 × 10⁸(L mol^-1 s^-1), T = 300K

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

Photosensitizer = Rose Bengal dianion; reported k = (3.8 ± 5.5) × 10⁷ L mol^-1 s^-1. [Indicator] = 5 × 10^-5 (mol L^-1).

Martire, D.O.; Braslavsky, S.E.; Garcia, N.A.
J. Photochem. Photobiol., A 61, 113-124 (1991)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: Dioxane

k = 1.9 × 10⁷(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = 5,10,15,20-Tetraphenylporphinatozinc(II).

Scurlock, R.; Rougee, M.; Bensasson, R.V.
Free Radical Res. Commun. 8, 251-258 (1990)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: CD₃OD

k = 1.4 × 10⁷(L mol^-1 s^-1), T = 293K

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

Photosensitizer = Hematoporphyrin IX. [Indicator] = 5× 10^-5-70 (mol L^-1).

Slawinska, D.
Photochem. Photobiol. 28, 453-458 (1978)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: EtOH, 95%, H₂O, 5%

k ~ 6 × 10⁸(L mol^-1 s^-1)

Experimental method: Chemical reaction
Analytical method: infrared luminescence
Data type: Derived from steady state measurements

¹O₂* from pyrogallol autooxidation by O₂/KOH; k_d not given.

Fahrenholtz, S.R.; Doleiden, F.H.; Trozzolo, A.M.; Lamola, A.A.
Photochem. Photobiol. 20, 505-509 (1974)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Solvent: C₅H₅N

k = 6.9 × 10⁷(L mol^-1 s^-1)

Experimental method: Modulated photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Photosensitizer = Indicator = Rubrene; used solvent k_d = 6.0 × 10⁴ s^-1; k for indicator = 4 × 10⁷ L/(mol·s).

Foote, C.S.; Denny, R.W.; Weaver, L.; Chang, Y.; Peters, J.
Ann. N.Y. Acad. Sci. 171, 139-145 (1970)

Reaction: 1,4-C₆H₄(OH)₂ + ¹O₂^* ® products and/or physical quenching
Reference Reaction: 2-Methyl-2-pentene + ¹O₂^* ®
Solvent: C₆H₆, 80%, MeOH, 20%

k = 7 × 10⁷(L mol^-1 s^-1), b_ref = 4 × 10^-2(mol L^-1), k_reference = 2.5 × 10⁶(L mol^-1 s^-1), T = 298K

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

Photosensitizer = Methylene Blue.