PL data for 1 and 2 as crystalline powders, in toluene solution, and as 2 wt% dopants in PS films at 298 K and 77 K (values in parentheses).

	1			2
	Powder	DFB	PSa matrix	Powder	DFB	PSa matrix
λ em (nm)	524, 564, 607	456	578	Poorly emissive	—	617
	(535, 578)	(531, 551, 572)	(550, 588)	—	(548, 612, 653)	(581, 617, 647)
τ (μs)	62.8c	0.022c	48.4c		—	0.56
	(157.4)	(227.2)	(153.1)	—	(112.3)c	(73.6)
Φ (%, 300 K; N2)	65.0	1.8	12.4	—	—	21.6
k r (104 s−1)	1.0	81.8	0.2	—	—	38.6
k nr (104 s−1)	0.5	4460	1.8	—	—	140
S1/T1b (eV)	3.11/2.41			2.37 (CT)/2.19 (3LE)

^aPolystyrene films (2% by weight) were drop-cast from 10 mg mL⁻¹ DFB solutions on a quartz substrate and evaporated under reduced pressure in a nitrogen-filled glove box chamber.

^bTriplet energy levels based on the emission max peak value in DFB glass at 77 K.

^cTwo-component lifetime, τ average was used: τ_av = (B₁/(B₁ + B₂))τ₁ + (B₂/(B₁ + B₂))τ₂, where B₁ and B₂ are relative amplitude for τ₁ and τ₂, respectively.