Long-Range Charge Transfer in DNA:  Transient Structural Distortions Control the Distance Dependence

2000 ◽  
Vol 33 (4) ◽  
pp. 253-260 ◽  
Author(s):  
Gary B. Schuster
Keyword(s):  
Charge Transfer ◽  
Long Range ◽  
Structural Distortions ◽  
Distance Dependence ◽  
Charge Transfer In Dna

TOWARD THE MECHANISM OF LONG-RANGE CHARGE TRANSFER IN DNA: THEORIES AND MODELS

2002 ◽  
Vol 01 (01) ◽  
pp. 225-244 ◽  
Author(s):  
YI JING YAN ◽  
HOUYU ZHANG
Keyword(s):  
Charge Transfer ◽  
Green’S Function ◽  
Long Range ◽  
Green's Function ◽  
Theoretical Development ◽  
Base Pairs ◽  
Hole Charge ◽  
Thymine Adenine ◽  
Recent Theoretical Development ◽  
Charge Transfer In Dna

This article reviews our recent theoretical development toward understanding the interplay of electronic structure and dephasing effects on charge transfer/transport through molecular donor-bridge-acceptor systems. Both the generalized scattering matrix and Green's function formalisms for partially incoherent tunneling processes are summarized. Presented is also an exact mapping between the kinetic rate constants and the electric conductances in evaluation of chemical yields of sequential charge transfer in the presence of competing branching reactions. As an important example, the mechanism of long-range charge transfer in DNA in aqueous solution is investigated with a quantum chemistry implementation of the generalized Green's function formalism. A time scale of about 5 ps is found for the partially incoherent tunneling through a thymine/adenine π-stack in DNA. Numerical results further show that while the carrier oxidative charge does hop sequentially over all guanine sites in a DNA duplex, its tunneling over thymine/adenine bridge base pairs deviates substantially from the superexchange regime. Presented are also evidences for the involvement of both intrastrand and interstrand pathways in the ground state hole charge transfer in DNA.

On the Long-Range Charge Transfer in DNA

2000 ◽  
Vol 104 (3) ◽  
pp. 443-445 ◽  
Author(s):  
Yuri A. Berlin ◽  
Alexander L. Burin ◽  
Mark A. Ratner
Keyword(s):  
Charge Transfer ◽  
Long Range ◽  
Charge Transfer In Dna

Effective bridge spectral density for long‐range biological energy and charge transfer

1996 ◽  
Vol 104 (15) ◽  
pp. 5821-5833 ◽  
Author(s):  
Oliver Kühn ◽  
Valery Rupasov ◽  
Shaul Mukamel
Keyword(s):  
Charge Transfer ◽  
Spectral Density ◽  
Long Range
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