Table 3. Low-Lying Excited States of Small Conjugated Molecules.

molecule	model	spin gap (eV)	ΔST (eV)	singlet gap (eV)	μ (Debye)/f
e	PPP	1.29	0.12	1.17	0.73
				1.81	0.82
				2.18	0.75
e	TDDFT			2.15	0.0
				2.43	0.0
				2.67	0.1
f	PPP	0.63	0.01	0.62	0.38
				1.62	0.59
				1.93	0.65
f	TDDFT	1.19	0.0	1.19	0.01
				2.57	0.0
				2.66	0.05
g	PPP	0.52	0.09	0.43	0.75
				1.22	0.51
				1.81	0.41
g	TDDFT	1.17	0.19	1.37	0.0
				2.05	0.0
				2.90	0.07