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Rates of DNA-Mediated Electron Transfer Between Metallointercalators
Abstract
Ultrafast emission and absorption spectroscopies were used to measure the kinetics of DNA-mediated electron transfer reactions between metal complexes intercalated into DNA. In the presence of rhodium(III) acceptor, a substantial fraction of photoexcited donor exhibits fast oxidative quenching (>3 × 10 10 per second). Transient-absorption experiments indicate that, for a series of donors, the majority of back electron transfer is also very fast (∼10 10 per second). This rate is independent of the loading of acceptors on the helix, but is sensitive to sequence and π stacking. The cooperative binding of donor and acceptor is considered unlikely on the basis of structural models and DNA photocleavage studies of binding. These data show that the DNA double helix differs significantly from proteins as a bridge for electron transfer.
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Cited by
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Zheng, M., Jagota, A., Semke, E. D., Diner, B. A., Mclean, R. S., Lustig, S. R., Richardson, R. E., & Tassi, N. G. (2003) · Nature Materials · doi:10.1038/nmat877 · Cited by 2,699
DNA-templated assembly and electrode attachment of a conducting silver wire
Braun, E., Eichen, Y., Sivan, U., & Ben-Yoseph, G. (1998) · Nature · doi:10.1038/35826 · Cited by 2,367
Proton-coupled electron transfer
Huynh, M. H. V., & Meyer, T. J. (2007) · Chemical Reviews · doi:10.1021/cr0500030 · Cited by 1,659
Mechanisms for DNA Charge Transport
Genereux, J. C., & Barton, J. K. (2010) · Chemical Reviews · doi:10.1021/cr900228f · Cited by 787
Self-citationLong-Range Charge Transfer in DNA: Transient Structural Distortions Control the Distance Dependence
Schuster, G. B. (2000) · Accounts of Chemical Research · doi:10.1021/ar980059z · Cited by 778
Metadata
- Authors
- Arkin, M. R., Stemp, E. D. A., Holmlin, R. E., Barton, J. K., Hörmann, A., Olson, E. J. C., & Barbara, P. F.
- Venue
- Science
- Published
- 1996-07-26
- Volume
- 273
- Issue
- 5274
- Pages
- 475-480
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2001287959
- Cited by
- 415
- References
- 0
- FWCI
- 22.51
- Type
- journal article
- Language
- en
- Open access
- closed
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- Arkin, M. R., Stemp, E. D. A., Holmlin, R. E., Barton, J. K., Hörmann, A., Olson, E. J. C., & Barbara, P. F. (1996). Rates of DNA-Mediated Electron Transfer Between Metallointercalators. Science. https://doi.org/10.1126/science.273.5274.475
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