Squarylium Dye 3a Singlet oxygen

Kuramoto, N.
J. Soc. Dyers Colour. 106, 181-186 (1990)

Reaction: 2-[[2-Butoxy-3-[(3-ethyl-2-benzothiazolylidene)methyl]-4-oxo-2-cyclobuten-1-ylidene]methyl]-3-ethylbenzothiazolium + ¹O₂^* ® products and/or physical quenching
Solvent: CHCl₃

k = 1.4 × 10⁹(L mol^-1 s^-1), T = 293K

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

Self-sensitized; used solvent k_d = 1.7 × 10⁴ s^-1; Indicator = Bis[1,2-diphenyl-1,2-ethenedithiolato]nickel(II). Use Bis[1,2-diphenyl-1,2-ethenedithiolato]nickel(II) as quencher.