Excited-state relaxation of protonated adenine.

Citation data:

Chemphyschem : a European journal of chemical physics and physical chemistry, ISSN: 1439-4235, Vol: 8, Issue: 5, Page: 751-5

Publication Year:
2007
Usage 5
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Citations 21
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/6255
PMID:
17366508
DOI:
10.1002/cphc.200600727
Author(s):
Nolting, Dirk; Weinkauf, Rainer; Hertel, Ingolf V; Schultz, Thomas
Publisher(s):
Wiley; WILEY-V C H VERLAG GMBH
Tags:
Physics and Astronomy; Chemistry; Conical intersections; Heterocycles; Nucleobases; Protonation; Time-resolved spectroscopy
article description
The excited state dynamics of protonated adenine in the gas phase were investigated by femtosecond pump-probe transient mass spectroscopy. Adenine was protonated in an electrospray ionization source and transferred to a Paul trap. Two femtosecond laser pulses at 266 nm and 800 nm excited the lowest electronic pipi* state and probed the excited-state dynamics by monitoring ion fragment formation. The measured excited state decay is monoexponential with a lifetime shorter than 161 fs. This agrees with a theoretical prediction of very fast internal conversion via a conical intersection with the ground state.