Table 1 Photophysical properties of DTPPAO and tBuDTPPAO (1 wt%) in different hosts

From: Tunable afterglow for mechanical self-monitoring 3D printing structures

 

Host

λPL/λPH (nm)a

S1/T1 (eV)b

ΔEST (eV)c

ΦPL (%)d

τ (ms)e

DTPPAO

TPO

440/500

3.05/2.77

0.28

4.01

86.1

TPP

440/500

3.06/2.77

0.29

5.60

110.6

SF

441/501

3.07/2.76

0.31

5.07

287.7

tBuDTPPAO

TPO

441/490

3.04/2.78

0.26

9.15

199.1

TPP

446/490

3.03/2.79

0.24

12.62

209.2

SF

442/490

3.04/2.78

0.26

8.38

298.4

  1. aThe peaks of fluorescence (RT) and phosphorescence spectra (77 K).
  2. bCalculated from the onsets of the fluorescence (RT) and phosphorescence spectra (77 K).
  3. cExperimentally determined singlet–triplet energy splitting.
  4. dPLQY measured in air at room temperature.
  5. eLifetimes of phosphorescence spectra at room temperature estimated from the transient decay curves.
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