Distance-Dependent Activation Energies for Hole Injection from Protonated 9-Amino-6-chloro-2-methoxyacridine into Duplex DNA
- 23 February 2002
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 124 (11) , 2422-2423
- https://doi.org/10.1021/ja017304l
Abstract
The recent investigation of the apparently anomalous attenuation factor (β > 1.5 Å-1) for photoinduced hole injection into DNA duplexes modified by protonated 9-amino-6-chloro-2-methoxyacridine (X+) led to the conclusion that in addition to the electronic couplings, the activation energy must also be distance-dependent. In this communication we report the verification of this postulate by direct measurements of the activation energies for a series of (X+)-modified DNA duplexes which sample an appreciable range of donor−acceptor distances (∼4−11 Å). The resulting changes in thermal activation energy can be explained within the framework of a distance-dependent reorganization energy.Keywords
This publication has 11 references indexed in Scilit:
- On the Apparently Anomalous Distance Dependence of Charge-Transfer Rates in 9-Amino-6-chloro-2-methoxyacridine-Modified DNAJournal of the American Chemical Society, 2001
- Dynamics of Photoinduced Charge Transfer and Hole Transport in Synthetic DNA HairpinsAccounts of Chemical Research, 2000
- Distance Dependence of Electron Transfer in DNA: The Role of the Reorganization Energy and Free EnergyThe Journal of Physical Chemistry B, 2000
- Electron transfer at a distance induced by site-selective photoionization of 2-aminopurine in oligonucleotides and investigated by transient absorption techniquesPhysical Chemistry Chemical Physics, 2000
- Long-Distance Charge Transport in DNA: The Hopping MechanismAccounts of Chemical Research, 2000
- Origin of the complex fluorescence emission of 9-amino-6-chloro-2-methoxyacridine. 2. TheoryThe Journal of Physical Chemistry, 1989
- Intramolecular vibrational excitations accompanying solvent-controlled electron transfer reactionsThe Journal of Chemical Physics, 1988
- The distance dependence of intramolecular electron-transfer rates: importance of the nuclear factorJournal of the American Chemical Society, 1988
- The distance dependence of electron transfer reactions: rate maxima and rapid rates at large reactant separationsJournal of the American Chemical Society, 1984
- The role of distance in electron transfer in solution. Experimental verification of the Hush-Marcus theory using mixed-valence complexesJournal of the American Chemical Society, 1976