Table 4. LUMO Energies of the Terpolymers and Their Respective Copolymers^a.

D1	D2	EL (D1–A) [eV]	EL (D2–A) [eV]	EL (D1–A–D2–A) [eV]	ΔLb [eV]
TPT	2T	–3.05	–3.35	–3.22	0.020
TPT	3T	–3.05	–3.13	–3.08	–0.010
TPT	4T	–3.05	–3.05	–3.01	–0.040
TPT	TTTT	–3.05	–3.07	–3.10	0.040
PyTPy	3T	–3.21	–3.21	–3.20	–0.010
TEDOTT	3T	–3.18	–3.13	–3.18	0.025
TDTPT	TBTT	–3.04	–3.37	–3.28	0.075

^aDetermined with square-wave voltammetry vs Fc/Fc⁺, which was set at −4.59 eV vs vacuum.³⁵

^bΔ_L = [E_L(D1–A) + E_L(D2–A)]/2 – E_L(D1–A–D2–A).