Nicotine Singlet oxygen

Larson, R.A.; Marley, K.A.
Phytochemistry 23, 2351-2354 (1984)

Reaction: Nicotine + ¹O₂^* ® products and/or physical quenching
Solvent: CHCl₃

k = 3.8 × 10⁷(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.

Peters, G.; Rodgers, M.A.J.
Biochim. Biophys. Acta 637, 43-52 (1981)

Reaction: Nicotine + ¹O₂^* ® physical quenching
Solvent: CH₃CN, 80%, D₂O, 20%

k_quen = 5.9 × 10⁷(mol L^-1)

Experimental method: Flash photolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly using indicator
Excitation wavelength: 337 nm

Photosensitizer = 2'-Acetonaphthone; Indicator = 1,3-Diphenylisobenzofuran; k_r = 0 estd. from lack of formation of O₂^-, detd. from buildup of radical anion in soln. contg. (2-20) × 10^-5 mol L^-1 1,4-benzoquinone in CH₃CN/D₂O (1:4). Added solute (0-70)e-5. [Sensitizer] = 1.0 × 10^-3 (mol L^-1). [Indicator] = 5.9 × 10^-5 (mol L^-1).

Schenck, G.O.; Gollnick, K.
J. Chim. Phys. Phys.-Chim. Biol. 55, 892-898 (1958)

Reaction: Nicotine + ¹O₂^* ® products and/or physical quenching
Reference Reaction: a-Terpinene + ¹O₂^* ®
Solvent: MeOH

b = 2.3 × 10^-1(mol L^-1), T = 288K

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

Photosensitizer = Rose Bengal dianion; Actinometer = a-Terpinene; meas. k_d/k = 0.23 mol/L. Rate of physical quenching/product formation = 5.4.