Table 2. Summary of the Photocatalytic Performance by Ru(II)–Ni(II)- and Ru(II)–Co(III)-Based Systems^a.

entry	photocatalyst	reductant	product formed	selectivity (%)	TON	reference
1	S1	ascorbic acid	CO	72	<1	(102)
2	[Ru(Phen)3]2+ + [Ni(cyclam)]2+	ascorbic acid	CO	36	<1	(102)
3	S2	ascorbic acid	CO	11	<1	(95)
4	[Ru(bpy)3]2+ + Ni moiety (as in S2)	ascorbic acid	CO	09	2	(95)
5	S3	TEOA	CO	50	2	(105)
6	[Ru(bpy)3]2+ + [Ni(bpy)3]2+	TEOA	CO	79	2	(105)
7	S4	TEOA	CO	73	3	(105)
8	S5	TEOA	CO	79	5	(105)
9	[Ru(bpy)3]2+ + [Co(bpy)3]3+	TEOA	CO	35	9	(105)

^aReproduced with permission from ref (53). Copyright [2017] [American Chemical Society].