TABLE 4.

Solution-state lifetimes of Ln^III centers in [Ln₂Ln’] complexes and associated q values for each, at 298 K (λ_ex = 280 nm, λ_em = 980 nm (Yb^III), 545 nm (Tb^III), 615 nm (Eu^III).

Complex	[Yb2Tb]		[Eu2Tb]		[Yb2Eu]
Metal	YbIII	TbIII	EuIII	TbIII	YbIII	EuIII
${\mathit{\tau }}_{{\mathit{H}}_{\mathbf{2}}\mathit{O}}$ (ms)	0.0019	1.7	0.60	1.0	0.0016	0.58
${\mathit{\tau }}_{{\mathit{D}}_{\mathbf{2}}\mathit{O}}$ (ms)	0.0078	3.0	1.9	2.4	0.0080	2.3
q	0.2	1.1	1.0	-	0.3	1.1