9,10-Anthraquinone

Hulme, B.E.; Land, E.J.; Phillips, G.O.
Pulse radiolysis of 9,10-anthraquinones. Part 2. Triplet excited states.
J. Chem. Soc., Faraday Trans. 1 68: 2003-12 (1972)

9,10-Anthraquinone
Solvent : Benzene

wave length at maximum = 370 nm wave length (nm) at maximum, extinction coefficient = 390, 10200

Triplet state population method: Pulse radiolysis
Extinction coefficient estimation method: Energy transfer
Lifetime = 0.2 micro sec.
Comments: *Triplet ET from benzophenone and triplet ET to anthracene; epsilon relative to benzophenone in benzene (epsilon532.5 = 7630 L mol–1 cm–1)

Harriman, A.; Mills, A.
Photochemistry of anthraquinone-2,6-disodium sulphonate in aqueous solution.
Photochem. Photobiol. 33: 619-25 (1981)

9,10-Anthraquinone
Solvent : Benzene

wave length at maximum = 370 nm

Triplet state population method: Flash photolysis
Lifetime = 0.11 micro sec.
Comments: *Oxygen quenching, triplet ET to beta-carotene

Hamanoue, K.; Kajiwara, Y.; Miyake, T.; Nakayama, T.; Hirase, S.; Teranishi, H.
Phosphorescence spectra and triplet lifetimes of halogenoanthraquinones.
Chem. Phys. Lett. 94: 276-80 (1983)

9,10-Anthraquinone
Solvent : EPA, 77 K

wave length at maximum = 365a nm

Triplet state population method: Flash photolysis
Lifetime = 3400 micro sec.
Comments: *Phosphorescence decay

Astier, R.; Meyer, Y.
Existence de bandes d'absorption transitoire entre 5000 et 8800 Å dans les molecules aromatiques et heterocycliques.
J. Chim. Phys. Phys.-Chim. Biol. 64: 919-21 (1967)

9,10-Anthraquinone
Solvent : EtOH/MeOH, 113 K

wave length (nm) at maximum, extinction coefficient = 370, >2000

Triplet state population method: Flash photolysis
Extinction coefficient estimation method: Total depletion
Comments: Solvent was 3:1 EtOH to MeOH; lower limit assumes total ground state depletion

Hamanoue, K.; Kajiwara, Y.; Miyake, T.; Nakayama, T.; Hirase, S.; Teranishi, H.
Phosphorescence spectra and triplet lifetimes of halogenoanthraquinones.
Chem. Phys. Lett. 94: 276-80 (1983)

9,10-Anthraquinone
Solvent : Toluene

wave length at maximum = 371a nm

Triplet state population method: Pulsed laser photolysis
Comments: *Phosphorescence decay in EPA at 77 K; delay 300 ns

* Evidence supporting the assignment of the transient triplet state.
a Data have been obtained by computer-assisted digitization from spectrum in cited reference.
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