On the intrinsic photophysics of indigo: a time-resolved photoelectron spectroscopy study of the indigo carmine dianion.
On the intrinsic photophysics of indigo: a time-resolved photoelectron spectroscopy study of the indigo carmine dianion.
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DOI：
10.1039/c2cp43275g
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发表时间：
2012-11
期刊：
影响因子：
--
通讯作者：
A. Chatterley;D. Horke;J. Verlet
中科院分区：
文献类型：
--
作者：
A. Chatterley;D. Horke;J. Verlet
用气相时间分辨光电子成像技术研究了靛蓝的内禀光物理。作用光谱表明，InC（2-）中S（1）<-- S（0）跃迁产生的气相吸收光谱具有与中性靛蓝类似的溶剂位移。飞秒光谱表明S（1）态在1.4ps的时间尺度上衰减。通过同位素取代，S（1）激发态的主要机制可以归因于分子内质子转移，这与在溶液中观察到的相同。然而，在真空中激发态寿命明显较短。这些相似之处和差异进行了讨论，在最近的理论研究的S（1）激发态的靛蓝。
The intrinsic photophysics of indigo has been studied using gas-phase time-resolved photoelectron imaging of the indigo carmine dianion (InC(2-)). The action spectrum reveals that the gas-phase absorption spectrum arising from the S(1) <-- S(0) transition in InC(2-) has a similar solvent shift to that of neutral indigo. Femtosecond spectroscopy shows that the S(1) state decays on a 1.4 ps timescale. Through isotopic substitution, the primary mechanism on the S(1) excited state can be assigned to an intra-molecular proton transfer, which is the same as that which has been observed in solution. However, the excited state lifetime is significantly shorter in vacuum. These similarities and differences are discussed in terms of recent theoretical investigations of the S(1) excited state of indigo.