Singlet oxygen quantum yields QY1_

Acridine (Ac)

Wilkinson, F.; Helman, W.P.; Ross, A.B.
J. Phys. Chem. Ref. Data 22(1): 113-262 (1993)

Sensitizer: Acridine (Ac)
Solvent: C₆H₆
Oxygen concentration: air or O₂

Quantum yield of formation = 0.83
Fraction of T₁ yielding singlet oxygen = 0.99

See Table 4.

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

Sensitizer: Acridine (Ac)
Solvent: C₆H₆
Oxygen concentration: O₂

Quantum yield of formation = 0.84^T
Fraction of T₁ yielding singlet oxygen = 1

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

lambda_exc = 355 nm; used phi_T(S) = 0.86^g. Measured phi_Delta = 0.84, Proportion of T₁ quenched by O₂ = 1 and phi_F.

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

Sensitizer: Acridine (Ac)
Solvent: C₆H₆
Oxygen concentration: O₂

Quantum yield of formation = 0.84^T
Fraction of T₁ yielding singlet oxygen = 1

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) = 0.86^g. Measured Proportion of T₁ quenched by O₂ = 1.

Gorman, A.A.; Lovering, G.; Rodgers, M.A.J.
J. Am. Chem. Soc. 100(14): 4527-32 (1978)

Sensitizer: Acridine (Ac)
Solvent: C₆H₆
Oxygen concentration: O₂

Quantum yield of formation = 0.6^T
Fraction of T₁ yielding singlet oxygen = 0.7

Experimental method: pulsed radiolysis
Data type: time resolved substrate disappearance; sensitizer triplet absorbance at end-of-pulse

Singlet oxygen acceptor = DPBF; used phi_T(S) = 0.86^g, epsilon_T(S) = 24,300 L mol^-1 cm^-1 at 440 nm. Measured G(³S*).

Scaiano, J.C.; MacEachern, A.; Arnason, J.T.; Morand, P.; Weir, D.
Photochem. Photobiol. 46(2): 193-9 (1987)

Sensitizer: Acridine (Ac)
Solvent: CDCl₃
Oxygen concentration: ~1.16 x 10^-2

Quantum yield of formation = 0.95^T

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

Singlet oxygen acceptor = DPBF; Triplet actinometer = BP; lambda_exc = 337 nm; used phi_T(AC) = 1, epsilon_T(AC) = 7640 L mol^-1 cm^-1 at 525 nm. Proportion of T₁ quenched by O₂ = 1; p_A = 1.

Redmond, R.W.; Braslavsky, S.E.
NATO ASI Ser., Ser. H 15(Photosensitisation): 93-5 (1988)

Sensitizer: Acridine (Ac)
Solvent: CH₃CN
Oxygen concentration: O₂

Quantum yield of formation = 0.82^T

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

lambda_exc = 354 nm.

^g Value of phi_T(S) used in this work to calculate phi_Delta, average of 0.73 [776258] and 1.0 [81 x 10¹⁴7].
^T Value corrected for 100% quenching of T₁.
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