A dynamic model for electron transport in DNA

D. M.A. Smith; L. Adamowicz

doi:10.1021/jp011426i

A dynamic model for electron transport in DNA

D. M.A. Smith, L. Adamowicz

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Abstract

A new model for the simulation of electron transport through duplex DNA is developed and applied to DNA segments of varying lengths consisting of a thymine and complementary adenine strand. The model for electron transport involves moving an excess electron from the 5′ to the 3′ end of the thymine strand by means of the fluctuating geometry of the thymines, using the molecular dynamics method coupled with N1-methylthymine vertical electron affinities calculated at the B3LYP/6-31+G* level of theory. The electron transport lifetimes calculated using this model follow the distance dependence of Jortner's incoherent multistep hopping theory (Jortner, J.; Bixon, M.; Langenbacher, T. Proc. Natl. Aad. Sci U.S.A. 1998, 95, 12759) and were found to decrease with temperature.

Original language	English (US)
Pages (from-to)	9345-9354
Number of pages	10
Journal	Journal of Physical Chemistry B
Volume	105
Issue number	38
DOIs	https://doi.org/10.1021/jp011426i
State	Published - Sep 27 2001

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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abstract = "A new model for the simulation of electron transport through duplex DNA is developed and applied to DNA segments of varying lengths consisting of a thymine and complementary adenine strand. The model for electron transport involves moving an excess electron from the 5′ to the 3′ end of the thymine strand by means of the fluctuating geometry of the thymines, using the molecular dynamics method coupled with N1-methylthymine vertical electron affinities calculated at the B3LYP/6-31+G* level of theory. The electron transport lifetimes calculated using this model follow the distance dependence of Jortner's incoherent multistep hopping theory (Jortner, J.; Bixon, M.; Langenbacher, T. Proc. Natl. Aad. Sci U.S.A. 1998, 95, 12759) and were found to decrease with temperature.",

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AB - A new model for the simulation of electron transport through duplex DNA is developed and applied to DNA segments of varying lengths consisting of a thymine and complementary adenine strand. The model for electron transport involves moving an excess electron from the 5′ to the 3′ end of the thymine strand by means of the fluctuating geometry of the thymines, using the molecular dynamics method coupled with N1-methylthymine vertical electron affinities calculated at the B3LYP/6-31+G* level of theory. The electron transport lifetimes calculated using this model follow the distance dependence of Jortner's incoherent multistep hopping theory (Jortner, J.; Bixon, M.; Langenbacher, T. Proc. Natl. Aad. Sci U.S.A. 1998, 95, 12759) and were found to decrease with temperature.

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A dynamic model for electron transport in DNA

Abstract

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