Table 1.

Photophysical properties of DSBs, DBDB[6], and DBDB[7]s in THF and their solid states.

	ϵ [M cm−2]	λ abs n [nm]	λ fl,THF a [nm]	λ fl,solid [nm]	Φ THF [a]	Φ solid	τ THF f [ns]	τ solid [ns]	k r,THF [108 s−1]	k r,solid [108 s−1]	k nr,THF [108 s−1]	k nr,solid [108 s−1]
DSB	59 000	355	411	465[b]	0.89	0.53[c]	1.45[h]	1.76[f i]	6.14[l]	3.01[m]	0.76[l]	2.67[m]
DSDMB	45 000	353	426	451[c]	0.91	0.45[c]	1.54	–[j]	5.91	–	0.58	–
PPB	36 000	314	411	456[d]	0.01	0.96[b]	–	1.36[f]	–	6.99	–	0.37
DBDB[6]	44 000	349	423	451[b]	>0.99	0.70[b]	1.40	3.92[f]	7.07	1.79	0.07	0.26
DBDB[7]	36 000	320	408	400[d]	0.11	0.94[b]	0.21	1.61[f]	5.24	5.71	42.4	0.50
DBDMDB[7]	40 000	273	392	382[e]	0.01	0.93[e]	–	–[k]	–	–	–	–
DBαMDB[7]	28 000	284	–	413[d]	<0.01	>0.99[b]	–	1.21[f]	–	8.18	–	0.08
5DBαMDB[7]	31 000	286	–	407[d]	<0.01	>0.99[b]	–	1.00[f]	–	9.90	–	0.10
tBuDBαMDB[7]	26 000	283	–	365[e]	<0.01	0.84[d]	–	–[g,j,k]	–	–	–	–

Excitation wavelength: [a] max λ _abs, [b] 370 nm, [c] 400 nm, [d] 330 nm, [e] 300 nm, [f] 379 nm, and [g] 269 nm. [h] Only τ ₂ is shown as its contribution to the overall decay is 91 %. τ ₁=0.74 ns (9 %). [i] Only τ ₁ is shown as its contribution to the overall decay is 93 %. τ ₂=3.92 ns (7 %). [j] Two components. DSDMB: 0.82 ns (63 %) and 1.67 ns (37 %); tBuDBαMDB[7]: 0.13 ns (32 %) and 1.74 ns (68 %). [k] As we did not have the proper wavelength cutting filter or LED laser, it was not possible to obtain these values for DBDMDB[7], and the result for tBuDBαMDB[7] might be inaccurate. [l] Calculated from τ ₂. [m] Calculated from τ ₁. [n] Dilute THF solution. The absorption spectra of the solid‐state compounds were measured by the diffuse‐reflection method (Figure S3).