Table 4.

Optical Properties of BF₂bdk/PLA Blends at 0.05% and 0.5% Dye Loadings at 77 K

	0.05% BF2bdk/PLA (w/w%)		0.5% BF2bdk/PLA (w/w%)
	λF/nma	τF/nsb	λF/nma	τF/nsb
1	412d	n/ac	391d	n/ac
2	421	2.11	413d	2.19
3	441	2.40	449	3.33
4	418 (524)e	weak (9.35)e	418 (531)e	1.54 (10.10)e
5	385	0.64	387	0.84
6	422	2.06	435	2.12
7	434	1.42	425	1.39
8	427 (523)e	1.85 (7.87)e	431 (529)e	2.03 (8.31)e
9	425	1.77	432	1.75
10	426	6.59	409d	7.81

^aExcited with 369 nm LED.

^bPre-exponential weighted lifetimes. All fluorescence lifetimes were fitted with triple-exponential decays.

^cSignal too weak to be detected with current LED excitation.

^dExcited at 350 nm.

^eValues in parentheses correspond to charge transfer processes.