Table 2 TTA-UC characteristics of annihilators (Py0-Py4) in combination with PdTPBP in toluene

From: Red light-driven electron sacrificial agents-free photoreduction of inert aryl halides via triplet-triplet annihilation

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

  1. aOptimized concentration of annihilator (μM);
  2. bStern–Volmer quenching constant (104 M-1);
  3. cBimolecular quenching constant (108 M-1s-1);
  4. dThreshold power intensity (mW/cm2);
  5. eTriplet-triplet energy transfer efficiency (ΦTTET %);
  6. fNormalized triplet-triplet annihilation efficiency (ηTTA %);
  7. g TTA-UC quantum yield (%);
  8. h ηUC = 2 × ΦUC, (%);
  9. i Upconverted delayed fluorescence lifetime (μs).
Back to article page