Time domain investigation of the intrachain vibrational dynamics of a prototypical light-emitting conjugated polymer.
Time domain investigation of the intrachain vibrational dynamics of a prototypical light-emitting conjugated polymer.
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原型发光共轭聚合物链内振动动力学的时域研究。
DOI：
10.1103/physrevlett.90.047402
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发表时间：
2003
影响因子：
8.6
通讯作者：
N. S. Sariçiftçi
中科院分区：
文献类型：
--
作者：
G. Lanzani;G. Cerullo;C. Brabec;N. S. Sariçiftçi
用亚10飞秒光脉冲对取代聚亚苯基乙烯基的激发态和基态碳骨架的相干核运动进行了真实的实时监测。得到了链内振动动力学的特征。我们观察到振动退相的激发态内1 ps（时间常数T（2e）约300 fs）。这些发现与共轭聚合物中光激发的分子图像是一致的。
Coherent nuclear motion of the carbon backbone is monitored in real time in substituted poly(phenylene)-vinylene in both excited and ground electronic state using sub-10-fs light pulses. Characteristic features of the intrachain vibrational dynamics are obtained. We observe vibrational dephasing in the excited state within 1 ps (time constant T(2e) approximately 300 fs). These findings are in agreement with the molecular picture for photoexcitation in conjugated polymers.