Long-lived excited-state dynamics of i-Motif structures probed by time-resolved infrared spectroscopy. Keane, P. M., Baptista, F. R., Gurung, S. P., Devereux, S. J., Sazanovich, I. V., Towrie, M., Brazier, J. A., Cardin, C. J., Kelly, J. M., & Quinn, S. J. ChemPhysChem, 17(9):1281–1287, 2016. tex.ids= keaneLongLivedExcitedStateDynamics2016doi abstract bibtex © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.UV-generated excited states of cytosine (C) nucleobases are precursors to mutagenic photoproduct formation. The i-motif formed from C-rich sequences is known to exhibit high yields of long-lived excited states following UV absorption. Here the excited states of several i-motif structures have been characterized following 267 nm laser excitation using time-resolved infrared spectroscopy (TRIR). All structures possess a long-lived excited state of ∼300 ps and notably in some cases decays greater than 1 ns are observed. These unusually long-lived lifetimes are attributed to the interdigitated DNA structure which prevents direct base stacking overlap.
@article{Keane2016,
title = {Long-lived excited-state dynamics of i-{Motif} structures probed by time-resolved infrared spectroscopy},
volume = {17},
issn = {14397641},
doi = {10.1002/cphc.201501183},
abstract = {© 2016 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.UV-generated excited states of cytosine (C) nucleobases are precursors to mutagenic photoproduct formation. The i-motif formed from C-rich sequences is known to exhibit high yields of long-lived excited states following UV absorption. Here the excited states of several i-motif structures have been characterized following 267 nm laser excitation using time-resolved infrared spectroscopy (TRIR). All structures possess a long-lived excited state of ∼300 ps and notably in some cases decays greater than 1 ns are observed. These unusually long-lived lifetimes are attributed to the interdigitated DNA structure which prevents direct base stacking overlap.},
number = {9},
journal = {ChemPhysChem},
author = {Keane, Páraic M. and Baptista, Frederico R. and Gurung, Sarah P. and Devereux, Stephen J. and Sazanovich, Igor V. and Towrie, Michael and Brazier, John A. and Cardin, Christine J. and Kelly, John M. and Quinn, Susan J.},
year = {2016},
pmid = {26879336},
note = {tex.ids= keaneLongLivedExcitedStateDynamics2016},
keywords = {DNA, cytosine, excited states, i-motifs, time-resolved infrared spectroscopy},
pages = {1281--1287},
}
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Here the excited states of several i-motif structures have been characterized following 267 nm laser excitation using time-resolved infrared spectroscopy (TRIR). All structures possess a long-lived excited state of ∼300 ps and notably in some cases decays greater than 1 ns are observed. 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