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DNA‐Mediated Electron Transfer across Synthetic T:A⋅T Triplex Structures
Author(s) -
Lewis Frederick D.,
Wu Yansheng,
Hayes Ryan T.,
Wasielewski Michael R.
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020916)41:18<3485::aid-anie3485>3.0.co;2-9
Subject(s) - electron transfer , excited state , acceptor , electron , chemistry , electron acceptor , ground state , dna , quantum tunnelling , ultrafast laser spectroscopy , spectroscopy , photochemistry , electron donor , chemical physics , atomic physics , physics , catalysis , optoelectronics , quantum mechanics , biochemistry
Exciting DNA threesome : Time‐resolved transient absorption spectroscopy has been used to study electron‐transfer processes between an excited‐state electron acceptor and a ground‐state electron donor, separated by a variable number of T:A⋅T triplet steps in triplex DNA (see figure). The formation and decay of both the acceptor anion radical and donor cation radical can be resolved. Electron tunneling is more effective at longer acceptor–donor distances in triplex than in duplex DNA.