Table 2.
TTA-UC characteristics of annihilators (Py0-Py4) in combination with PdTPBP in toluene
| An | c a | ksvb | kq c | Ith d | ΦTTET e | ηTTA f | ΦUC g | ηUCh | τDFi |
|---|---|---|---|---|---|---|---|---|---|
| Py0 | 700 | 11.0 | 7.8 | 81.4 | 97 | 4.3 | 3.5 | 7.0 | 374.1 |
| Py1 | 600 | 14.9 | 10.5 | 80.9 | 97.5 | 6.8 | 5.8 | 11.6 | 493.5 |
| Py2 | 500 | 24.0 | 16.9 | 80.4 | 98.3 | 14.0 | 9.8 | 19.6 | 539.9 |
| Py3 | 1000 | 12.7 | 8.9 | 97.6 | 98.1 | 11.3 | 9.3 | 18.6 | 607.3 |
| Py4 | 500 | 14.4 | 10.2 | 82.5 | 96.7 | 15.7 | 11.4 | 22.8 | 622.4 |
aOptimized concentration of annihilator (μM);
bStern–Volmer quenching constant (104 M-1);
cBimolecular quenching constant (108 M-1s-1);
dThreshold power intensity (mW/cm2);
eTriplet-triplet energy transfer efficiency (ΦTTET %);
fNormalized triplet-triplet annihilation efficiency (ηTTA %);
g TTA-UC quantum yield (%);
h ηUC = 2 × ΦUC, (%);
i Upconverted delayed fluorescence lifetime (μs).