Tetraphenylcyclopentadienone Singlet oxygen

Amat-Guerri, F.; Lopez-Gonzalez, M.M.C.; Martinez-Utrilla, R.; Sastre, R.
J. Photochem. Photobiol., A 53, 199-210 (1990)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products and/or physical quenching
Reference Reaction: DPBF + ¹O₂^* ®
Solvent: CH₃OH

b = 2.5 × 10^-4(mol L^-1), b_ref = 7.3 × 10^-5(mol L^-1)

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

Photosensitizer = MB. meas. k_d/k = 2.5 × 10^-4 mol/L.

Amat-Guerri, F.; Lopez-Gonzalez, M.M.C.; Martinez-Utrilla, R.; Sastre, R.
J. Photochem. Photobiol., A 53, 199-210 (1990)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products and/or physical quenching
Solvent: Dioxane

b = 1.6 × 10^-4(mol L^-1)

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

Photosensitizer = O-Methyl Rose Bengal methyl ester; 10^-3 mol L^-1 HCl. meas. k_d/k = 1.6 × 10^-4 mol/L. Added solute 10^-5. [Indicator] = 10^-4 (mol L^-1).

Caminade, A.M.; El Khatib, F.; Koenig, M.; Aubry, J.M.
Can. J. Chem. 63, 3203-3209 (1985)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products and/or physical quenching
Solvent: CH₂Cl₂

k = 1.1 × 10⁸(L mol^-1 s^-1), b = 1.0 × 10^-4(mol L^-1)

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

used solvent k_d = 1.2 × 10⁴ s^-1; ¹O₂* from triphenyl phosphite ozonide; 46% product formation.

Stevens, B.; Marsh, K.L.
J. Phys. Chem. 86, 2553-2556 (1982)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products and/or physical quenching
Solvent: Benzene

k_react = 1 × 10⁸(L mol^-1 s^-1), b = 1.1 × 10^-4(mol L^-1), T = 298K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements
Excitation wavelength: 365 nm

Photosensitizer = Coronene; used solvent k_d = 3.7 × 10⁴ s^-1; physical quenching/product formation = 1.6.

Stevens, B.; Marsh, K.L.
J. Phys. Chem. 86, 2553-2556 (1982)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products
Reference Reaction: DPBF + ¹O₂^* ®
Solvent: Benzene

k/k_reference = 2.6 × 10^-1
T = 298K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 365 nm

Photosensitizer = 1,3-Diphenylisobenzofuran. meas. k/k_ref = 0.26.

Stevens, B.; Marsh, K.L.
J. Phys. Chem. 86, 2553-2556 (1982)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products
Solvent: Acetonitrile

k_react = 6 × 10⁷(L mol^-1 s^-1), k_quen = 4 × 10⁸(mol L^-1), T = 298K

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

Photosensitizer = Coronene; physical quenching/product formation = 6.2. used solvent k_d = 1.8 × 10⁴ s^-1.

Gruen, H.; Steffen, H.; Schulte-Frohlinde, D.
J. Soc. Dyers Colour. 97, 430-435 (1981)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products
Reference Reaction: Bilirubin + ¹O₂^* ®
Solvent: Dibutyl terephthalate

k/k_reference = 1.0

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 589 nm

Photosensitizer = N-[2-[(2-Bromo-4,6-dinitrophenyl)azo]-5-[(2-cyanoethyl)(2-hydroxyethyl)amino]-4-methoxyphenyl]acetamide. meas. k/k_ref = 1.0.

Gruen, H.; Steffen, H.; Schulte-Frohlinde, D.
J. Soc. Dyers Colour. 97, 430-435 (1981)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products
Reference Reaction: Bilirubin + ¹O₂^* ®
Solvent: 1-Phenylethanol

k/k_reference = 6 × 10^-1

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 589 nm

Photosensitizer = N-[2-[(2-Bromo-4,6-dinitrophenyl)azo]-5-[(2-cyanoethyl)(2-hydroxyethyl)amino]-4-methoxyphenyl]acetamide. meas. k/k_ref = 0.6.

Gruen, H.; Steffen, H.; Schulte-Frohlinde, D.
J. Soc. Dyers Colour. 97, 430-435 (1981)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products
Reference Reaction: Bilirubin + ¹O₂^* ®
Solvent: CHCl₃

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 589 nm

Photosensitizer = N-[2-[(2-Bromo-4,6-dinitrophenyl)azo]-5-[(2-cyanoethyl)(2-hydroxyethyl)amino]-4-methoxyphenyl]acetamide; meas. k_r^A = <<0.06 × k_r^A in dibutyl terephthalate.

Gruen, H.; Steffen, H.; Schulte-Frohlinde, D.
J. Soc. Dyers Colour. 97, 430-435 (1981)

Reaction: Tetraphenylcyclopentadienone + ¹O₂^* ® products
Reference Reaction: Bilirubin + ¹O₂^* ®
Solvent: Biphenyl, 25%, Diphenyl ether, 75%

k/k_reference = 6 × 10^-1

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 589 nm

Photosensitizer = N-[2-[(2-Bromo-4,6-dinitrophenyl)azo]-5-[(2-cyanoethyl)(2-hydroxyethyl)amino]-4-methoxyphenyl]acetamide. meas. k/k_ref = 0.6.