Vibrational relaxation of the 2 A g − excited state in all- trans -β-carotene obtained by femtosecond time-resolved Raman spectroscopy
Vibrational relaxation of the 2 A g − excited state in all- trans -β-carotene obtained by femtosecond time-resolved Raman spectroscopy
复制标题
通过飞秒时间分辨拉曼光谱获得全反式-β-胡萝卜素中 2 A g − 激发态的振动弛豫
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
H. Hashimoto
中科院分区：
文献类型：
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作者：
M. Yoshizawa;H. Aoki;H. Hashimoto
Relaxation kinetics in all-trans-ensuremath{eta}-carotene has been investigated by recently developed femtosecond Raman spectroscopy. We observed the stimulated Raman signal of the ${2A}_{g}^{ensuremath{-}}$ excited state which is converted from the photogenerated ${1B}_{u}^{+}$ state. The vibrational relaxation in the ${2A}_{g}^{ensuremath{-}}$ state takes place within 0.6 ps until the $l=1$ vibrational level, but the relaxation from the $l=1$ level to the $l=0$ level is slower than 10 ps. The unusual kinetics is explained in terms of the ${1B}_{u}^{ensuremath{-}}$ state which exists between the $l=1$ and $l=2$ levels of the ${2A}_{g}^{ensuremath{-}}$ state.
Relaxation kinetics in all-trans-ensuremath{eta}-carotene has been investigated by recently developed femtosecond Raman spectroscopy. We observed the stimulated Raman signal of the ${2A}_{g}^{ensuremath{-}}$ excited state which is converted from the photogenerated ${1B}_{u}^{+}$ state. The vibrational relaxation in the ${2A}_{g}^{ensuremath{-}}$ state takes place within 0.6 ps until the $l=1$ vibrational level, but the relaxation from the $l=1$ level to the $l=0$ level is slower than 10 ps. The unusual kinetics is explained in terms of the ${1B}_{u}^{ensuremath{-}}$ state which exists between the $l=1$ and $l=2$ levels of the ${2A}_{g}^{ensuremath{-}}$ state.