5-Methylfurfural Singlet oxygen

Cottier, L.; Descotes, G.; Nigay, H.; Parron, J.-C.; Gregoire, V.
Bull. Soc. Chim. Fr., 844-850 (1986)

Reaction: 5-Methylfurfural + ¹O₂^* ® products
Reference Reaction: Furfuryl alcohol + ¹O₂^* ®
Solvent: CH₃CH₂OH

k/k_reference = 5.9 × 10^-1
T = 293K

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

Photosensitizer = Rose Bengal dianion. Meas. k/k_ref = 0.59.

Gollnick, K.; Griesbeck, A.
Tetrahedron 41, 2057-2068 (1985)

Reaction: 5-Methylfurfural + ¹O₂^* ® products
Solvent: MeOH

k_react = 1.7 × 10⁶(L mol^-1 s^-1), b = 8.4 × 10^-2(mol L^-1), T = 286K

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Derived from steady state measurements

Photosensitizer = Rose Bengal or Tetraphenylporphine; used solvent k_d = 1.4 × 10⁵ s^-1. [Sensitizer] = 2× 10^-4-10 (mol L^-1).

Clennan, E.L.; Mehrsheikh-Mohammadi, M.E.
J. Am. Chem. Soc. 106, 7112-7118 (1984)

Reaction: 5-Methylfurfural + ¹O₂^* ® products and/or physical quenching
Solvent: CH₂Cl₂

k = 5.3 × 10⁵(L mol^-1 s^-1)

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

Photosensitizer = Indicator = Rubrene; used solvent k_d = 1 × 10⁴ s^-1; k for indicator = 3.3 × 10⁷ L/(mol·s).