Table 3. Steady-State S-V Constant at [Q] = 0 and Other Quenching Constants for [2AHBC]^a,b.

binary solvent mixture (% v/v)	KSV0 (M–1)	Db = D × 105 (cm2 s–1)	R′ (Å)	4πN′DR′ × 10–9 or kd (M–1 s–1)	ka × 10–9 (M–1 s–1)	kq × 10–9 (M–1 s–1)	1/η (10–2 × P–1)
100% ACN + 0% DXN	13.119	1.918	8.220	11.926		23.345	2.904
80% ACN + 20% DXN	9.009	1.155	9.370	8.190		18.552	2.871
60% ACN + 40% DXN	8.436	1.376	7.330	7.639		13.297	2.439
40% ACN + 60% DXN	8.268	1.058	9.390	7.516		16.443	1.881
20% ACN + 80% DXN	6.536	0.931	8.430	5.942		11.570	1.295
0% ACN + 100% DXN	5.228	0.666	9.430	4.752		10.515	0.848

^a(2AHBC) R = R_S (3.68 Å) + R_Q (2.84 Å) = 6.52 Å. (R_S, radii of the solute, R_Q radii of the quencher).

^bτ₀ = 1.10 ns, D^b: diffusion coefficients determined from the finite sink model.