Table 2: Fluorescence lifetimes of PdC and tC° in single- and double-strand DNA. The and are obtained by fitting a double exponential decay curve to the data, and and are fraction of fluorescence corresponding to lifetimes and , respectively. The indicate the measure of error in the fit. The value is average lifetime calculated by .

Oligo (ns) (ns) (ns)

ss tC°
ds tC°
ss PdC5.
ds PdC3.