Pyrazole dye 4 Singlet oxygen

Douglas, P.; Townsend, S.M.; Ratcliffe, R.
J. Imaging Sci. 35, 211-218 (1991)

Reaction: N¹,N¹-Diethyl-3-methyl-N⁴-(3-phenylpyrazolo[5,1-c]-1,2,4-triazol-7-ylidene)-1,4-benzenediamine + ¹O₂^* ® products
Reference Reaction: N-[3-(Aminosulfonyl)phenyl]-3-[(3-cyano-5-hydroxy-1-phenylpyrazol-4-yl)azo]-4-methoxybenzenesulfonamide + ¹O₂^* ®
Solvent: EtOH

k_react = 2.7 × 10⁵(L mol^-1 s^-1), k_reference = 2.4 × 10⁶(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 670 nm

Photosensitizer = Chloroaluminum(III) sulfophthalocyanine; values from graph. Added solute 1.8 × 10^-5. [Sensitizer] = 8 × 10^-7 (mol L^-1).