Conjugation length dependence of relaxation kinetics in β-carotene homologs probed by femtosecond Kerr-gate fluorescence spectroscopy
Conjugation length dependence of relaxation kinetics in β-carotene homologs probed by femtosecond Kerr-gate fluorescence spectroscopy
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DOI：
10.1016/j.cplett.2006.05.023
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发表时间：
2006-07-03
影响因子：
2.8
通讯作者：
Yoshizawa, Masayuki
中科院分区：
文献类型：
--
作者：
Kosumi, Daisuke;Yanagi, Kazuhiro;Yoshizawa, Masayuki
利用飞秒克尔门荧光光谱研究了具有共轭双键的全反式类胡萝卜素（n=7-15）的光学允许S-2（1（1）B（u）（+））态的超快动力学.消除了过量振动能的影响，确定了S-2态的寿命。寿命在n=9时有一个最大值，并表现出对S-2和S-1态之间能隙的反常依赖性。(c)2006 Elsevier B. V.保留所有权利。
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.