The 1Bu+→3Ag-→1Bu-→2Ag- internal conversion in carotenoids following the energy-gap law identified by 5 fs spectroscopy
The 1Bu+→3Ag-→1Bu-→2Ag- internal conversion in carotenoids following the energy-gap law identified by 5 fs spectroscopy
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DOI：
10.1016/j.cplett.2006.02.042
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发表时间：
2006-04-28
影响因子：
2.8
通讯作者：
Kobayashi, T
中科院分区：
文献类型：
--
作者：
Ikuta, M;Yabushita, A;Kobayashi, T
子5 fs的时间分辨吸收光谱记录类胡萝卜素与11，12，和13个双键。通过奇异值分解和整体拟合，确定了1B（u）（+）-> 3A（g）（-）-> 1B（u）（-）-> 2A（g）（-）的逐步内转换过程，并确定了这些单重激发态的差谱模式和寿命。内转换的每一步速率都遵循能隙定律。(c)2006 Elsevier B. V.保留所有权利。
Sub-5 fs time-resolved absorption spectra were recorded for carotenoids with 11, 12, and 13 double bonds. Singular-value decomposition followed by global fitting of the spectral data identified the stepwise internal conversion processes of 1B(u)(+) -> 3A(g)(-) -> 1B(u)(-) -> 2A(g)(-), and determined the difference-spectral patterns and the lifetimes of these singlet-excited states were determined. The rate in each step of internal conversion was found to follow the energy-gap law among the set of carotenoids. (c) 2006 Elsevier B.V. All rights reserved.