Singlet oxygen quantum yields QY2

20-Phorbinecarboxylic acid, 3,4,20,21-tetradehydro-4,9,14,19-tetraethyl-18,19-dihydro-3,8,13,18-tetramethyl-, ethyl ester, zinc(II) (Etiopurpurin ethyl ester, zinc(II))

Borland, C.F.; McGarvey, D.J.; Morgan, A.R.; Truscott, T.G.
J. Photochem. Photobiol., B 2(4): 427-34 (1988)

Sensitizer: 20-Phorbinecarboxylic acid, 3,4,20,21-tetradehydro-4,9,14,19-tetraethyl-18,19-dihydro-3,8,13,18-tetramethyl-, ethyl ester, zinc(II) (Etiopurpurin ethyl ester, zinc(II))
Solvent: C₆H₆
Oxygen concentration: air^a

Quantum yield of formation = 0.54

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

Reference sensitizer = BChl a; rel. to phi_Delta(ref. sens.) = 0.35; meas. phi_T(S) = 0.84; lambda_exc = 694 nm. f_Delta^T = 0.71 assuming PSO2 = 0; Proportion of T₁ quenched by O₂ = 1.

Borland, C.F.; McGarvey, D.J.; Morgan, A.R.; Truscott, T.G.
J. Photochem. Photobiol., B 2(4): 427-34 (1988)

Quantum yield of formation = 0.68*; 0.60

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

Reference sensitizer = Ac; rel. to phi_Delta(ref. sens.) = 0.73; meas. phi_T(S) = 0.84; lambda_exc = 347 nm. f_Delta^T = 0.64 assuming PSO2 = 0; Proportion of T₁ quenched by O₂ = 1.

^a Oxygen concentration not given; assumed to be air saturated.
* Values recalculated using phi_Delta(S') or f_Delta^T(S') from Table 4 or from the quoted reference.
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