UV-vis absorption maxima (nm), redox potentials (V) and electrochemical HOMO–LUMO gaps (ΔE, V) for selected compounds.

Compound	Soret	Q	E 1/2−ox2	E 1/2−ox1	E 1/2−red1	E 1/2−red2	ΔE	Ref.
Au[TpOCH3PC]	420	560, 580	1.32	0.76	−1.57	—	2.33	6
Au[TpCH3PC]	420	560, 576	1.35	0.78	−1.42	—	2.20	6
Au[TPC]	418	560, 575	1.35	0.80	−1.38	—	2.18	6
Au[TpFPC]	419	559, 573	1.38	0.85	−1.37	—	2.22	6
Au[TpCH3PC-3-CHO]	428	581, 602	—	—	—	—	—	tw
Au[TpFPC-3-CHO]	427	580, 597	—	1.03	−1.02	−1.46	2.05	tw
Au[TpOCH3PC-3,17-(CHO)2]	439	597, 618	1.36	1.03	−0.92	−1.42	1.95	tw
Au[TpCH3PC-3,17-(CHO)2]	439	596, 615	—	1.07	−0.92	−1.43	1.99	tw
Au[TPC-3,17-(CHO)2]	437	596, 611	—	1.14	−0.87	−1.39	2.01	tw
Au[TpFPC-3,17-(CHO)2]	436	597, 609	—	1.20	−0.81	−1.34	2.01	tw
Re[TpOCH3PC](O)	441	556, 592	—	0.93	−1.29	—	2.22	8
Re[TpCH3PC](O)	440	555, 587	—	0.94	−1.29	—	2.23	8
Re[TPC](O)	439	552, 585	—	0.98	−1.26	—	2.24	8
Re[TpFPC](O)	438	553, 585	—	1.01	−1.23	—	2.24	8
Re[TpCF3PC](O)	438	552, 585	—	1.10	−1.16	—	2.26	8
Re[TpOCH3PC-3-CHO](O)	449	609	1.30	1.03	−1.00	−1.40	2.03	tw
Re[TpCH3PC-3-CHO](O)	449	611	1.41	1.08	−0.96	−1.36	2.04	tw
Re[TPC-3-CHO](O)	452	613	—	1.15	−0.89	−1.29	2.04	tw
Re[TpFPC-3-CHO](O)	448	608	—	1.17	−0.90	−1,30	2.07	tw
Re[TpCF3PC-3-CHO](O)	448	607	—	1.23	−0.84	−1,25	2.07	tw