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Issue 18, 2012
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Ultrafast IR spectroscopy of polymeric cytosine nucleic acids reveal the long-lived species is due to a localised state

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Abstract

The decay pathways of UV-excited cytosine polymers are investigated using picosecond time-resolved infrared spectroscopy. Similar yields of a non-emissive 1nπ* state are found in the single-stranded dC30 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 1nπ* excited states are the most significant intermediates present on the picosecond timescale.

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

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Publication details

The article was received on 28 Nov 2011, accepted on 25 Jan 2012 and first published on 22 Feb 2012


Article type: Paper
DOI: 10.1039/C2CP23774A
Citation: Phys. Chem. Chem. Phys., 2012,14, 6307-6311
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    Ultrafast IR spectroscopy of polymeric cytosine nucleic acids reveal the long-lived species is due to a localised state

    P. M. Keane, M. Wojdyla, G. W. Doorley, J. M. Kelly, I. P. Clark, A. W. Parker, G. M. Greetham, M. Towrie, L. M. Magno and S. J. Quinn, Phys. Chem. Chem. Phys., 2012, 14, 6307
    DOI: 10.1039/C2CP23774A

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