Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 14, Issue 18, Pages 6307-6311Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cp23774a
Keywords
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Funding
- Science Foundation Ireland [06/RFP/CHP035, 07/RFP/CHEF437, 10/RFP/CAP2915]
- EU [App81030]
- Science Foundation Ireland (SFI) [06/RFP/CHP035, 10/RFP/CAP2915, 07/RFP/CHEF437] Funding Source: Science Foundation Ireland (SFI)
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The decay pathways of UV-excited cytosine polymers are investigated using picosecond time-resolved infrared spectroscopy. Similar yields of a non-emissive (1)n pi* 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)n pi* excited states are the most significant intermediates present on the picosecond timescale.
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