Table 1.

The photophysical properties of TTM-TPA, PyBTM-TPA, and Y6 with different degrees of deuteration

Compounds	λAbs (nm)	λEm (nm)	Φ (%) a	ΦD/Φ b	τobs (ns)	kr (107 s−1) c	knr (107 s−1) c
TTM-TPA	660	800	24.0	1.00	8.35	2.9	9.1
TTM-TPA-d6	660	800	25.4	1.06	8.80	2.9	8.5
TTM-TPA-d14	660	800	27.3	1.14	9.86	2.8	7.4
perD-TTM-TPA	660	800	30.7	1.28	10.34	2.9	6.7
PyBTM-TPA	720	905	7.3	1.00	2.72	2.7	34.1
PyBTM-TPA-d6	720	905	8.2	1.13	2.77	2.9	33.1
PyBTM-TPA-d14	720	905	8.8	1.21	3.21	2.7	28.4
perD-PyBTM-TPA	720	905	10.4	1.43	3.39	3.0	26.4

^aPLQYs were measured in toluene using known compound TTM-TPA as a standard.

^bIncrease in PLQY ratio (compare to parent radical).

^cEmission lifetimes were measured using TCSPC system with excitation at 375 nm, k_r = PLQY/τ_obs and k_nr = (1-PLQY)/τ_obs.