Table 1.

Luminescence Decay Parameters for rac–, Δ– and Λ–Ru(bpy)₂dppz²⁺ with DNA^a

Complex	DNA	τ1 (ns)b	τ2 (ns)b	τ1:τ2b
rac-Ru	Matched	72	212	83:17
	Mismatched	74	213	77:23
	Abasic	86	192	69:31
Δ-Ru	Matched	83	245	88:12
	Mismatched	91	296	86:14
	Abasic	90	204	79:21
Λ-Ru	Matched	41	199	89:11
	Mismatched	37	156	78:22
	Abasic	69	167	41:59

^aSamples containing 10 μM Ru and 20 μM DNA (5 mM Tris, pH 7.5, 50 mM NaCl) were used for the excited state lifetime measurements (λ_ex = 470 nm, λ_em = 610 nm). The 27-mer oligonucleotides (matched, mismatched and abasic DNA, Figure 2) were used.

^bUncertainties in excited state lifetimes are ≤ 10%.

^cRelative contributions of each lifetime to the overall decay.