Table 2. Summary of the photophysical properties.

	λ abs, nm a (log ε)	λ f a nm	φ f	τ f d ns	τ T e μs	φ Δ	τ S g ns	k ISC h (109) s–1	E T i eV	ΔEST k eV
TBTz	463 (4.95)	515	0.07 b	0.17	3.9	0.83	0.20	4.19	1.38 (1.53) j	1.09
TPD	475 (4.84)	542	0.14 b	0.50	6.2	0.57	0.52	1.10	1.49 (1.59) j	0.88
TQT	370, 518 (4.84, 4.63)	660	0.38 b	3.89	2.62	0.24	2.14	0.112	1.22	0.88
TBT	370, 546 (4.71, 4.54)	685	0.43 b	4.84	1.81	0.15	3.16	0.048	1.08	0.93
TPT	406, 638 (4.81, 4.48)	835	0.009 c	0.28	0.18	NA f	0.22	0.005 l	0.71	0.85
EQE	386, 559 (4.76, 4.53)	709	0.29 c	2.25	1.78	0.36	2.38	0.15	1.20	0.75
EBE	389, 596 (4.78, 4.57)	758	0.42 c	3.65	1.37	0.32	5.76	0.056	1.01	0.83

^aMeasured in THF at room temperature.

^bMeasured in THF using rhodamine B (φ_f = 0.69)29 as an actinometer.

^cMeasured in THF using tetraphenylporphyrin (φ_f = 0.12)30 as an actinometer.

^dMeasured by TCSPC in dry THF.

^eMeasured by nanosecond transient absorption spectroscopy, in deoxygenated THF.

^f TPT is not a singlet oxygen sensitizer.

^gMeasured by femtosecond transient absorption spectroscopy in THF. The fitting parameters and kinetics plots are shown in ESI (Fig. S8).

^hCalculated from k_ISC = φ_ISC/τ_S where it is assumed that φ_ISC ≈ φ_Δ.

ⁱT₁ energy computed by DFT.

^jMeasured in MeTHF at 77 K.

^kEnergy difference between the experimental S₁ energy found from the emission spectrum and the T₁ energy calculated by DFT.

^lEstimated from the linear relationship presented in Fig. 6A and B.