Table 6.
Phosphorescence Emission Maxima and Computational Estimates of the Singlet Triplet Gaps.
| 0.05% in PLA/N2 | 0.5% in PLA/N2 | TD S-T Absorption Wavelengthsa | Wavelengths from the B3LYP S-T Energy Gapb | |
|---|---|---|---|---|
| 1 | - | - | 540 | 501 |
| 2 | 486 | 488 | 564 | 554 |
| 3 | 533 | 542 | 701 | 621 |
| 4 | - | - | 1105 | 899 |
| 5 | 466 | 478 | 549 | 510 |
| 6 | 494 | 505 | 590 | 547 |
| 7 | 535 | 544 | 691 | 611 |
| 8 | - | - | 1095 | 886 |
| 9 | 505 | 504 | 590 | 548 |
| 10 | 522 | 527 | 697 | 616 |
Singlet-triplet excitation energy estimated by TD-B3LYP/6-311+G(d), at the UB3LYP/6-31G(d) optimized T1 geometry.
Direct differences of B3LYP/6-31G(d) for singlet and UB3LYP/6-31G(d) for triplet, all at the UB3LYP/6-31G(d) optimized T1 geometry.