Ultrafast IR spectroscopy of polymeric cytosine nucleic acids reveal the long-lived species is due to a localised state

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Title: Ultrafast IR spectroscopy of polymeric cytosine nucleic acids reveal the long-lived species is due to a localised state
Authors: Keane, Páraic M.
Wojdyla, Michal
Doorley, Gerard W.
Kelly, John M.
Clark, Ian P.
Parker, Anthony W.
Greetham, Gregory M.
Towrie, Michael
Magno, Luís M.
Quinn, Susan J.
Permanent link: http://hdl.handle.net/10197/4322
Date: 22-Feb-2012
Abstract: The decay pathways of UV-excited cytosine polymers are investigated using picosecond time-resolved infrared spectroscopy. Similar yields of a non-emissive (1)nÏ * state are found in the single-stranded dC(30) polymer as in the dCMP monomer, but with a longer lifetime in the polymer (80 ps vs. 39 ps). A longer lifetime is also found in the d(CpC) dinucleotide. No evidence of excimer states is observed, suggesting that localised (1)nÏ * excited states are the most significant intermediates present on the picosecond timescale.
Type of material: Journal Article
Publisher: RSC Publishing
Copyright (published version): 2012, Royal Society of Chemistry
Keywords: C-rich sequences;Photo-mutation;Localisation of damage;dC30 polymer;dCMP monomer;d(CpC) dinucleotide
DOI: 10.1039/c2cp23774a
Language: en
Status of Item: Peer reviewed
Appears in Collections:Chemistry Research Collection

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