Excited-state dynamics of cytosine tautomers.

Citation data:

Journal of the American Chemical Society, ISSN: 1520-5126, Vol: 131, Issue: 46, Page: 16939-43

Publication Year:
2009
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Citations 61
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/6249
PMID:
19874018
DOI:
10.1021/ja907355a
Author(s):
Kosma, Kyriaki; Schroeter, Christian; Samoylova, Elena; Hertel, Ingolf Volker; Schultz, Thomas
Publisher(s):
American Chemical Society (ACS); AMER CHEMICAL SOC
Tags:
Chemical Engineering; Chemistry; Biochemistry, Genetics and Molecular Biology; Ab initio theory; Excited-state dynamics; Femtoseconds; Imino tautomers; Internal conversions; Picoseconds; Relaxation dynamics; Tautomerizations; Wavelength ranges
article description
We report the relaxation dynamics of keto and enol or keto-imino cytosine, photoexcited in the wavelength range of 260-290 nm. Three transients with femtosecond to hundreds of picoseconds lifetimes are observed for the biologically relevant keto tautomer and are assigned to internal conversion and excited-state tautomerization. Only two transients with femtosecond and picosecond lifetimes are identified for the enol or keto-imino tautomer and are assigned to internal conversion processes. The results are discussed in the context of published ab initio theory.