Lowest Triplet Levels of the Polyacenes

Effect of Magnetic Field on the Fluorescence of Tetracene Crystals: Exciton Fission

“…1 is a strong indication that a singlet state at -2.40 eV is strongly coupled to a magnetically sensitive radiationless decay channel which is thermally populated from the dimer state S. Our experiments support the proposal of Swenberg and Stacy 5 that there is a double-triplet-exciton energy state (TyT^ lying slightly above the singlet state S. If this is the case, the triplet-exciton energy in tetracene can be estimated at -1.20 eV. The solution value is 1.26 eV, 14 which indicates that the crystal value obtained in this way is reasonable.…”

Bidirectional triplet exciton transfer between silicon nanocrystals and perylene

“…This analysis suggests a natural way to skew this equilibrium towards surface-bound triplet transmitting molecules would be to either employ smaller Si QDs with larger exciton energies or replace perylene with a triplet transmitter with a lower triplet energy. Indeed, for the Si QD ensemble employed in our study our model predicts that replacement of perylene with tetracene ( E T = 1.25 eV) 62–64 would significantly skew the equilibrium highlighted in Fig. 3C towards the organic transmitter, with >94% of the excited population residing on tetracene.…”

Unimolecular Decay of the Triplet State of Anthracene in Fluid and Viscous Media

“…4) for dibenzanthracene in tetrahydrofuran, indicates that the quenching by CuCb has an energy of activation appreciably greater than 1.9 kcal. 7 McGlynn et al 8 calculate a value of 11 sec 1 for anthracene from integrated absorption measurements. In contrast to this, AEtcuC12 for anthracene in tetrahydrofuran is about 1.9 kcal.…”