IR 140 Singlet oxygen

Carre, C.; Reichardt, C.; Lougnot, D.J.
J. Chim. Phys. Phys.-Chim. Biol. 84, 577-585 (1987)

Reaction: 5-Chloro-2-[2-[3-[(5-chloro-3-ethyl-2-benzothiazolylidene)ethylidene]-2-(diphenylamino)-1-cyclopenten-1-yl)ethenyl]-3-ethylbenzothiazolium, perchlorate + ¹O₂^* ® physical quenching
Solvent: Propylene carbonate

k_quen = 9.8 × 10⁹(mol L^-1), T = 293K

Experimental method: Flash photolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly using indicator
Excitation wavelength: 633 nm

Photosensitizer = Methylene Blue; Indicator = 1,3-Diphenylisobenzofuran. meas. k_total, calc. k_q knowing k_prod. [Sensitizer] = 2 × 10^-6 (mol L^-1).

Carre, C.; Reichardt, C.; Lougnot, D.J.
J. Chim. Phys. Phys.-Chim. Biol. 84, 577-585 (1987)

Reaction: 5-Chloro-2-[2-[3-[(5-chloro-3-ethyl-2-benzothiazolylidene)ethylidene]-2-(diphenylamino)-1-cyclopenten-1-yl)ethenyl]-3-ethylbenzothiazolium, perchlorate + ¹O₂^* ® products
Reference Reaction: DPBF + ¹O₂^* ®
Solvent: Propylene carbonate

k_react = 1.6 × 10⁸(L mol^-1 s^-1), k_reference = 1.0 × 10⁹(L mol^-1 s^-1), T = 293K

Experimental method: Flash photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured directly

Photosensitizer = MB.

Lougnot, D.J.; Lepaja, S.; Fouassier, J.P.
J. Chim. Phys. Phys.-Chim. Biol. 79, 617-628 (1982)

Reaction: 5-Chloro-2-[2-[3-[(5-chloro-3-ethyl-2-benzothiazolylidene)ethylidene]-2-(diphenylamino)-1-cyclopenten-1-yl)ethenyl]-3-ethylbenzothiazolium, perchlorate + ¹O₂^* ® products
Solvent: DMSO

k_react = 3.8 × 10⁶(L mol^-1 s^-1), T = 295K

Experimental method: Photolysis
Analytical method: colorimetry
Data type: Derived from steady state measurements
Excitation wavelength: 514 nm

Photosensitizer = Thionine; used solvent k_d = 1.3 × 10⁴ s^-1; used singlet oxygen quantum yield for sensitizer = 0.87.

Lougnot, D.J.; Lepaja, S.; Fouassier, J.P.
J. Chim. Phys. Phys.-Chim. Biol. 79, 617-628 (1982)

Reaction: 5-Chloro-2-[2-[3-[(5-chloro-3-ethyl-2-benzothiazolylidene)ethylidene]-2-(diphenylamino)-1-cyclopenten-1-yl)ethenyl]-3-ethylbenzothiazolium, perchlorate + ¹O₂^* ® products
Solvent: CH₃OH

k_react = 1.4 × 10⁷(L mol^-1 s^-1), T = 295K

Experimental method: Photolysis
Analytical method: colorimetry
Data type: Derived from steady state measurements
Excitation wavelength: 514 nm

Photosensitizer = Thionine; used solvent k_d = 1.4 × 10⁵ s^-1; used singlet oxygen quantum yield for sensitizer = 0.87.