Strychnine Singlet oxygen

Allan, D.; Gorman, A.A.; Hamblett, I.; Hodgson, B.W.; Lambert, C.
Photochem. Photobiol. 57, 893-894 (1993)

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

k = 9.0 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone.

Gorman, A.A.; Hamblett, I.; Land, E.J.
J. Am. Chem. Soc. 111, 1876-1877 (1989)

Reaction: Strychnine + ¹O₂^* ® products and/or physical quenching
Solvent: C₆D₆

k = 8.8 × 10⁸(L mol^-1 s^-1)

Experimental method: Pulse radiolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = 2'-Acetonaphthone. [Sensitizer] = 2 × 10^-2 (mol L^-1).

Gorman, A.A.; Hamblett, I.; Smith, K.; Standen, M.C.
Tetrahedron Lett. 25, 581-584 (1984)

Reaction: Strychnine + ¹O₂^* ® products and/or physical quenching
Solvent: Toluene

Activation energy = 7(kJ mol^-1), Log(A) = 10.196, Enthalpy of activation = 4(kJ mol^-1), Entropy of activation = -77(J K^-1 mol^-1), Temperature range 183 to 363 K
k = 9.3 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone; see also [88GOR/HAM]. [Sensitizer] = 2.9 × 10^-3 (mol L^-1).

Gorman, A.A.; Hamblett, I.; Smith, K.; Standen, M.C.
Tetrahedron Lett. 25, 581-584 (1984)

Reaction: Strychnine + ¹O₂^* ® products and/or physical quenching
Solvent: C₆H₆

k_quen = 1.0 × 10⁹(mol L^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone; comparison with 2,3-dimethyl-2-butene shows strychnine 10 times less reactive, therefore k is at least 99% physical quenching. [Sensitizer] = 3-7 × 10^-3 (mol L^-1). [Indicator] = 0-15 × 10^-5 (mol L^-1).

Gorman, A.A.; Hamblett, I.; Smith, K.; Standen, M.C.
Tetrahedron Lett. 25, 581-584 (1984)

Reaction: Strychnine + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 6.4 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone. [Sensitizer] = 3-7 × 10^-3 (mol L^-1). [Indicator] = 0-15 × 10^-5 (mol L^-1).

Gorman, A.A.; Hamblett, I.; Smith, K.; Standen, M.C.
Tetrahedron Lett. 25, 581-584 (1984)

Reaction: Strychnine + ¹O₂^* ® products and/or physical quenching
Solvent: (CH₃)₂CO

k = 9.4 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone. [Sensitizer] = 3-7 × 10^-3 (mol L^-1). [Indicator] = 0-15 × 10^-5 (mol L^-1).

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

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

k = 2.4 × 10⁸(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.

Gorman, A.A.; Hamblett, I.; Smith, K.; Standen, M.C.
Tetrahedron Lett. 25, 581-584 (1984)

Reaction: Strychnine + ¹O₂^* ® products and/or physical quenching
Solvent: EtOH

k = 1.1 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone. [Sensitizer] = 3-7 × 10^-3 (mol L^-1). [Indicator] = 0-15 × 10^-5 (mol L^-1).