Table 2. Summary of the Results from the Characterization of the PbS Nanoparticles Synthesized with Different Capping Ligands^a.

system	size (nm)	onsetred (V)	onsetoxi (V)	Egechem (eV)	Abs λmax, (nm)	Egopt (eV)	Eg(EELS) (eV)	CB LUMO (eV)	VB HOMO (eV)
PbS-OA	4.18	–2.04	–0.30	1.76	1000	1.11	1.35	3.06	4.24
	5.32	–1.87	0.05	1.92	1095	1.07		3.23	4.36
	5.97	–1.86	–0.11	1.75	1222	0.95		3.24	4.24
	6.27	–1.88	–0.11	1.77	1285	0.89		3.22	4.16
	6.73	–1.71	0.12	1.83	1368	0.842		3.39	4.28
PbS-MA	2.94	–2.03	–0.10	1.93	779	1.30	1.5	3.07	4.47
	3.64	–2.11	–0.16	1.95	1029	1.046		2.99	4.12
	3.83	–2.13	–0.19	1.94	1049	1.054		2.97	4.10
	4.08	–2.14	–0.08	2.06	1166	0.96		2.96	3.99
	5.33	–2.24	–0.13	2.11	1400	0.79		2.86	3.71
PbS-HA	4.03	–2.07	–0.12	1.95	817	1.20		3.03	4.30
	5.05	–2.08	–0.10	1.98	1285	0.80		3.02	3.88

^aReduction and oxidation onsets with respect to ferrocene (Fc) used as an internal standard. E_g^echem = electrochemical band gap, Abs = maximum value of the first optical absorption peak, E_g = optical band gap, and E_g(EELS) = band gap calculated through EELS. HOMO and LUMO are calculated on an absolute energy scale using the following equations: (3)²⁰ and (4)¹⁰