双链DNA分子内电荷转移超交换机理

doi:10.3866/PKU.WHXB20020715

Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (07): 640-643.doi: 10.3866/PKU.WHXB20020715

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Superexchange Mechanism of Charge Transfer in Supermolecular Assemblies

Xu Si-Chuan;Ai Xi-Cheng;Feng Juan;Zhang Ru-Bo;Zhang Qi-Yuan;Zhang Xing-Kang

State Key Laboratory for Structural Chemistry of Unstable and Stable Species,Molecular Science Center,Institute of Chemistry,Chinese Academy of Sciences,Beijing　100080

Received:2001-11-20 Revised:2001-12-31 Published:2002-07-15
Contact: Xu Si-Chuan E-mail:xusc@chem.pku.edu.cn

Abstract

Abstract: The investigation on charge migration mechanism in double helix DNA is an important current issue extensively studied in the overlapping field of chemistry and biology.We have designed and synthesized a series of supermolecular assemblies of double helix DNA to study charge migration mechanism in DNA by measuring Ap fluorescence and its relative fluorescence quantum yield.Experimentaly,we have distinguished and observed superexchange mechanism of charge transfer in the supermolecular assemblies of double helix DNA,which plays a role in DNA for short distance; but hopping mechanism may be exhibited by the phonon-assisted polaron-like hopping migration.

Key words: DNA, Ap, Superexchange mechanism, Hopping mechanism

Xu Si-Chuan;Ai Xi-Cheng;Feng Juan;Zhang Ru-Bo;Zhang Qi-Yuan;Zhang Xing-Kang. Superexchange Mechanism of Charge Transfer in Supermolecular Assemblies[J]. Acta Phys. -Chim. Sin. 2002, 18(07), 640-643. doi: 10.3866/PKU.WHXB20020715

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Superexchange Mechanism of Charge Transfer in Supermolecular Assemblies

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