Ultrafast Internal Conversion of All- Trans -β-Carotene Studied by Femtosecond Spectroscopy
Ultrafast Internal Conversion of All- Trans -β-Carotene Studied by Femtosecond Spectroscopy
复制标题
通过飞秒光谱研究全反式-β-胡萝卜素的超快内转换
DOI：
10.1080/1058726021000044532
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
J. Takeda
中科院分区：
文献类型：
--
作者：
N. Furukawa;J. Takeda
我们在相同的实验条件下通过时间分辨吸收和荧光光谱研究了全反式-g-胡萝卜素的超快内部转化。 1Bu + 态的寿命被确定为210 v fs。根据涉及四个能级的分析，1Ag m； , 2Ag m; , 1Bu米;和 1Bu + ，我们获得了瞬态吸收带的光谱形状，该吸收带对应于 2Ag m 的振动能级（ l =1, 2）的跃迁；态至更高激发态以及从 1Bu + 和/或 1Bu m ；在 400-1000 v nm 的宽波长范围内从态到更高的激发态。
We investigated the ultrafast internal conversion of all- trans - g -carotene through time-resolved absorption and fluorescence spectroscopy under same experimental conditions. The lifetime of 1Bu + state was determined to be 210 v fs. Based on the analysis which involves four energy levels, 1Ag m; , 2Ag m; , 1Bu m; and 1Bu + , we obtained the spectral shape of the transient absorption bands which correspond to the transitions from the vibronic levels ( l =1, 2) of the 2Ag m; state to higher excited states and from the 1Bu + and/or 1Bu m; state to higher excited states in a wide wavelength range of 400-1000 v nm.