'Triplet-Triplet Absorption Spectra

Anthracene-d₁₀

Nouchi, G.
Etude et interpretation des spectres d'absorption triplet-triplet. Classification des etats triplets superieurs. II. Les hydrocarbures aromatiques.
J. Chim. Phys. Phys.-Chim. Biol. 66: 554-65 (1969)

Anthracene-d₁₀
Solvent : Cyclohexane, 77 K

wave length at maximum = 467.1; 445.0; 427.5; 421.5; 413.6; 407.0; 398.0 nm

Triplet state population method: Photostationary
Comments: Relative intensities (1:1:2:10:6:4:4)

Windsor, M.W.; Dawson, W.R.
Quantum efficiencies of triplet formation in aromatic molecules.
Mol. Cryst. 4(1-4): 253-8 (1968)

Anthracene-d₁₀
Solvent : EPA, 77 K

wave length (nm) at maximum, extinction coefficient = 426, 115000

Triplet state population method: Photostationary
Extinction coefficient estimation method: Singlet depletion

Lavalette, D.
Polarized excitation spectrum of the triplet-triplet absorption of aromatic hydrocarbons.
Chem. Phys. Lett. 3: 67-70 (1969)

Anthracene-d₁₀
Solvent : EPA, 77 K

wave length at maximum = 427 nm

Triplet state population method: Photostationary
Comments: Transition assigned as ³B\z_1g\Z^–\Z <– ³B\z_2u\Z⁺\Z

Brinen, J.S.
Quantitative ESR studies of organic triplet states. Extinction coefficients of T –> T' transitions.
Molecular Luminescence, Lim, E.C. (ed.), W.A. Benjamin, Inc., New York, 1969, p.333-49

Anthracene-d₁₀
Solvent : Et₂O/EtOH/Toluene, 77 K

wave length (nm) at maximum, extinction coefficient = 425, 75000

Triplet state population method: Photostationary
Extinction coefficient estimation method: Electron spin resonance intensity
Oscillator strength = 0.27.
Comments: ^*ESR; solvent was 2:1:1 Et₂O to EtOH to toluene; only most intense visible peak reported; assignment ³B_3g <– ³B_2u

Meyer, Y.H.; Astier, R.
Dichroisme de l'anthracene triplet.
J. Phys. (Paris) 29(11-12): 1075-80 (1968)

Anthracene-d₁₀
Solvent : EtOH/MeOH, 104 K

wave length at maximum = 424; 401 nm

Triplet state population method: Photostationary
Comments: Solvent was 3:1 EtOH to MeOH; polarization also measured; shoulder at 382 nm

Kellogg, R.E.
Second triplet state of anthracene.
J. Chem. Phys. 44: 411-2 (1966)

Anthracene-d₁₀
Solvent : PMMA, 298 K

wave length at maximum = 894^a; 851^a; 811^a; 796^a; 760^a nm

Triplet state population method: Flash photolysis
Lifetime = 8.4 x 10⁴ micro sec.
Comments: ^*Decay matches the triplet decay at 424 nm

Shaw, R.W.; Nicol, M.
Phosphorescence and triplet-triplet absorption spectra of anthracene-d₁₀ in polymethylmethacrylate under high pressures.
Chem. Phys. Lett. 39: 108-12 (1976)

Anthracene-d₁₀
Solvent : PMMA, 293 K

wave length at maximum = 888^a; 840^a; 785^a; 715^a nm

Triplet state population method: Continuous wave laser excitation
Lifetime = 85 x 10³ micro sec.
Comments: ^*Phosphorescence decay; spectrum measured at 2.0 kbar and assigned to the ³B\z⁺\Z_1g\Z <– ³B\z⁺\Z_2u\Z transition; only principal maxima reported here; at atmospheric pressure lowest energy maximum is at 895 nm

Shaw, R.W.; Nicol, M.
Phosphorescence and triplet-triplet absorption spectra of anthracene-d₁₀ in polymethylmethacrylate under high pressures.
Chem. Phys. Lett. 39: 108-12 (1976)

Anthracene-d₁₀
Solvent : PMMA, 293 K

wave length at maximum = 428^a; 404^a nm

Triplet state population method: Continuous wave laser excitation
Lifetime = 85 x 10³ micro sec.
Comments: ^*Phosphorescence decay; maxima shift to the red with increase in applied pressure; spectrum measured at 5.4 kbar and assigned to the ³B\z^–\Z_1g\Z <– ³B\z⁺\Z_2u\Z transition; relative intensities (8:1); at atmospheric pressure principal maximum is at 424 nm

^* 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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Anthracene-d10

Anthracene-d₁₀