Singlet oxygen quantum yields QY1_

Acetophenone (AP)

Gorman, A.A.; Rodgers, M.A.J.
J. Am. Chem. Soc. 108(17): 5074-8 (1986)

Sensitizer: Acetophenone (AP)
Solvent: C₆H₆
Oxygen concentration: air

Quantum yield of formation = __; 0.29^T
Fraction of T₁ yielding singlet oxygen = 0.35*; 0.29

Experimental method: pulsed laser photolysis
Data type: luminescence intensity at end-of-pulse or under steady-state conditions; sensitizer triplet absorbance at end-of-pulse

Reference sensitizer = BP; rel. to f_Delta^T(ref. sens.) = 0.29; lambda_exc = 355 nm; used phi_T(S) = 1^c.

Garner, A.; Wilkinson, F.
Singlet Oxygen, Reactions with Organic Compounds and Polymers, B. Ranby and J.F. Rabek (eds.), John Wiley & Sons, New York, N.Y., 1976, p.48-53

Sensitizer: Acetophenone (AP)
Solvent: C₆H₆
Oxygen concentration: air^a

Quantum yield of formation = 0.41^T
Fraction of T₁ yielding singlet oxygen = 0.41

Experimental method: pulsed laser photolysis
Data type: triplet beta-carotene buildup as a probe for singlet oxygen production

Reference sensitizer = BP; TD = S; rel. to f_Delta^T(ref. sens.) = 0.35; used phi_T(S) = 1. Measured phi_Delta(S)/phi_Delta(ref. sens.) = 1.2.

Redmond, R.W.; Braslavsky, S.E.
Chem. Phys. Lett. 148(6): 523-9 (1988)

Sensitizer: Acetophenone (AP)
Solvent: C₆H₆
Oxygen concentration: O₂

Quantum yield of formation = 0.33^T
Fraction of T₁ yielding singlet oxygen = 0.33

Experimental method: pulsed laser photolysis
Data type: heat produced from singlet oxygen

lambda_exc = 355 nm; used phi_T(S) = 1. Measured phi_Delta = 0.31, Proportion of T₁ quenched by O₂ = 0.94 and phi_F.

Redmond, R.W.; Braslavsky, S.E.
Chem. Phys. Lett. 148(6): 523-9 (1988)

Sensitizer: Acetophenone (AP)
Solvent: C₆H₆
Oxygen concentration: O₂

Quantum yield of formation = 0.36^T
Fraction of T₁ yielding singlet oxygen = 0.36

Experimental method: pulsed laser photolysis
Data type: luminescence intensity at end-of-pulse or under steady-state conditions

Reference sensitizer = Pz; rel. to phi_Delta(ref. sens.) = 0.83; used phi_T(S) = 1. Measured Proportion of T₁ quenched by O₂ = 0.94.

Chattopadhyay, S.K.; Kumar, C.V.; Das, P.K.
J. Photochem. 30(1): 81-91 (1985)

Sensitizer: Acetophenone (AP)
Solvent: C₆H₆
Oxygen concentration: O₂

Quantum yield of formation = __; 0.35^T
Fraction of T₁ yielding singlet oxygen = 0.31*; 0.35

Experimental method: pulsed laser photolysis
Data type: time resolved substrate disappearance; triplet acceptor absorbance at end-of-pulse

Reference sensitizer = BP; Singlet oxygen acceptor = DPBF; TSinglet oxygen acceptor = 1-MeNp; rel. to f_Delta^T(ref. sens.) = 0.39; meas. phi_T(S) = 1^e; lambda_exc = 337 nm. ShowedProportion of T₁ quenched by O₂ (S and S') > 0.95.

Chattopadhyay, S.K.; Kumar, C.V.; Das, P.K.
J. Photochem. 30(1): 81-91 (1985)

Sensitizer: Acetophenone (AP)
Solvent: CH₃CN
Oxygen concentration: O₂

Quantum yield of formation = 0.52^T
Fraction of T₁ yielding singlet oxygen = 0.52

Experimental method: pulsed laser photolysis
Data type: time resolved substrate disappearance; triplet acceptor absorbance at end-of-pulse

Reference sensitizer = BP; Singlet oxygen acceptor = DPBF; TSinglet oxygen acceptor = 1-MeNp; rel. to f_Delta^T(ref. sens.) = 0.37; meas. phi_T(S) = 1^e; lambda_exc = 337 nm. Showed Proportion of T₁ quenched by O₂ (S and S') > 0.95.

Gollnick, K.; Franken, T.; Schade, G.; Doerhoefer, G.
Ann. N.Y. Acad. Sci. 171(1): 89-107 (1970) (International Conference on Singlet Molecular Oxygen and its Role in Environmental Sciences)

Sensitizer: Acetophenone (AP)
Solvent: MeOH
Oxygen concentration: O₂

Quantum yield of formation < 0.58

Experimental method: continuous photolysis
Data type: oxygen consumption under steady-state conditions

Singlet oxygen acceptor = 2,5-DMF; lambda_exc = 283-373 nm. Some free radical reaction occurs.

^a Oxygen concentration not given; assumed to be air saturated.
^c Value of phi_T(S) from the literature used in this work to calculate phi_Delta.
^e Value of phi_T(S) measured or quoted by the authors, used in this work to calculate phi_Delta.
^T Value corrected for 100% quenching of T₁.
* Values recalculated using phi_Delta(S') or f_Delta^T(S') from Table 4 or from the quoted reference.
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