S1
Dynamics-Mediated Charge Transport in Double Helical DNA
Melanie A. O’Neill and Jacqueline K. Barton
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena,
California 91125
Supporting Information
Figure S-1
. Arrhenius-Eyring plots describing the dependence of k
CT
on temperature in ApG
(closed circles) and ApAG (open circles) DNA duplexes (ln(k/T) = ln(k
B
/h) +
Δ
S*/R –
Δ
H*/RT). Here k
CT
is defined as k
CT
= k
G
- k
I
, where k
G
and k
I
are the decay rate constants in
the redox active (G) and redox-inactive (I) assemblies, respectively. The rate constants were
obtained by femtosecond transient absorption spectroscopy and correspond to the fast component
of the decay of Ap* from a biexponential fitting.
23
17
17.5
18
18.5
19
19.5
20
20.5
0.002
0.0025
0.003
0.0035
0.004
ln(k/T)
1/T (K
-1
)