Piperazine Singlet oxygen

Iu, K.-K.; Thomas, J.K.
J. Am. Chem. Soc. 112, 3319-3325 (1990)

Reaction: Piperazine + ¹O₂^* ® products and/or physical quenching
Solvent: Cyclohexane

k = 1.7 × 10⁶(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = 2'-Acetonaphthone.

Young, R.H.; Martin, R.L.; Feriozi, D.; Brewer, D.; Kayser, R.
Photochem. Photobiol. 17, 233-244 (1973)

Reaction: Piperazine + ¹O₂^* ® products and/or physical quenching
Solvent: MeOH

k = 1.2 × 10⁶(L mol^-1 s^-1)

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

Photosensitizer = Rose Bengal dianion; Indicator = 1,3-Diphenylisobenzofuran. used solvent k_d = 9.0 × 10⁴ s^-1.