Journal
CHEMICAL PHYSICS LETTERS
Volume 425, Issue 1-3, Pages 66-70Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2006.05.023
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Ultrafast dynamics of the optically allowed S-2 (1(1)B(u)(+)) state in all-trans-carotenoids with a number of conjugated double bonds, n=7-15, has been investigated by femtosecond Kerr-gate fluorescence spectroscopy. The lifetime of the S-2 state is determined eliminating effect of excess vibrational energy. The lifetime has a maximum for n=9 and shows anomalous dependence on the energy gap between the S-2 and S-1 states. (c) 2006 Elsevier B.V. All rights reserved.
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