Table 3.

Hypochromicity and exciplex yields for various dinucleosides compared with the fraction of stacked bases determined by NMR and CD spectroscopy

Dinucleoside	h†, %	Yield, %	Stacked, %
			NMR‡	CD§
ApA	9.4	29 ± 5	38 ± 2	50
ApC	7.6	27 ± 8	38 ± 2	55
ApG	5.8	33 ± 6	25 ± 2	—
ApU	5.0	23 ± 9	34 ± 3	41

^†Percent hypochromicity at λ_max from ref. 37.

^‡Ref. 38 for ApA and ApG; ref. 39 for ApC and ApU (20°C).

^§Ref. 40; solutions contained 4.7 M potassium fluoride.