Table 1.

Excited state lifetimes and quantum yields for emission and singlet oxygen production for Ru-ip-nTunder different conditions.

Complex	τem.[c]		τTA.[c]		Ф em.[c]		Ф Δ[d]
	Aerated (μs)	Deaerated (μs)	Aerated (μs)	Deaerated (μs)	Aerated	Deaerated
Ru-ip-0T	0.4	0.7	0.4	0.7	0.038	0.05	0.68
Ru-ip-1T	0.4	0.8	0.4	0.7	0.044	0.06	0.61
Ru-ip-2T	0.3; 1[a]	0.6; 11[a]	1.4	14	0.006	0.04	0.71
Ru-ip-3T	0.3	0.6	1.4	48	-[b]	4.8×10−4	0.77
Ru-ip-4T	0.3	0.6	1.4	29	-[b]	8.1×10−4	0.81

τ_em. : emission lifetime; τ_TA.: recovery lifetime; $\mathrm{\Phi }$_em.: quantum yield of emission; $\mathrm{\Phi }$_Δ: singlet oxygen quantum yield. Singlet oxygen was determined spectroscopically by monitoring its emission centered at 1275 nm in aerated MeCN. [Ru(bpy)₃][PF₆]₂ is used as the reference obtaining $\mathrm{\Phi }$_em.^[27] and $\mathrm{\Phi }$_Δ.^[28]

^[a]A biexponential decay of the respective signal is observed.

^[b]Emission is too low to obtain a reasonable estimate of the emission quantum yield.

^[c]Solvent used is H₂O.

^[d]Solvent used is MeCN.