A first detection of singlet to triplet conversion from the 11B-u to the 13Ag state and triplet internal conversion from the 13Ag to the 13Bu state in carotenoids:: dependence on the conjugation length
A first detection of singlet to triplet conversion from the 11B-u to the 13Ag state and triplet internal conversion from the 13Ag to the 13Bu state in carotenoids:: dependence on the conjugation length
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DOI：
10.1016/s0009-2614(03)00983-7
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发表时间：
2003-07-24
影响因子：
2.8
通讯作者：
Koyama, Y
中科院分区：
文献类型：
--
作者：
Rondonuwu, FS;Watanabe, Y;Koyama, Y
在可见光区记录了一组具有不同共轭双键数（n）的光合类胡萝卜素的亚皮秒时间分辨吸收光谱，这些类胡萝卜素包括脉孢烯（n = 9）、类球烯（n = 10）、番茄红素（n = 11）、脱水红色素（n = 12）和大豆黄素（n = 13）。奇异值分解和光谱数据矩阵的整体拟合使我们得到一个分支松弛方案，该方案包括：（1）单重态内部转换，其顺序为1（1）B（u）（+）--> 1（1）B（u）（-）--> 2（1）A（g）（-）--> 1（1）A（g）（-）（基），（2）1（1）B（u）（-）→ 1（3）A（g）的单重态→三重态转化，接着是1（3）Ag → 1（3）B（u）的三重态内转化。(C)2003 Elsevier B. V.保留所有权利。
Subpicosecond time-resolved absorption spectra were recorded in the visible region for a set of photosynthetic carotenoids having different numbers of conjugated double bonds (n), which include neurosporene (n = 9), spheroidene (n = 10), lycopene (n = 11), anhydrorhodovibrin (n = 12) and spirilloxanthin (n = 13). Singular-value decomposition and global fitting of the spectral-data matrices lead us to a branched relaxation scheme including both (1) the singlet internal conversion in the sequence of 1(1)B(u)(+) --> 1(1)B(u)(-) --> 2(1)A(g)(-) --> 1(1)A(g)(-) (ground), and (2) the singlet-to-triplet conversion of 1(1)B(u)(-) --> 1(3)A(g) followed by triplet internal conversion of l(3)Ag --> 1(3)B(u). (C) 2003 Elsevier B.V. All rights reserved.