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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Ultrafast potential energy surface softening of one-dimensional organic conductors revealed by picosecond time-resolved laue crystallography
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Ultrafast potential energy surface softening of one-dimensional organic conductors revealed by picosecond time-resolved laue crystallography

机译：皮秒时间分辨劳厄晶体学揭示一维有机导体的超快势能表面软化

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摘要

Time-resolved Laue crystallography has been employed to study the structural dynamics of a one-dimensional organic conductor (tetrathiafulvalene- p-chloranil) during photoexcitation in the regime of the neutral to ionic phase transition. Exciting this crystalline system with 800 nm 100 fs long optical pulses leads to ultrafast population of a structural intermediate as early as 50 ps after excitation with a lifetime of at least 10 ns. Starting from the neutral phase, this intermediate has been assigned as a precursor state toward the photoinduced population of the ionic phase. The observed intensity changes are significantly different from comparable equilibrium structures. The interpretation of this structural data is that the potential of this intermediate is being softened during its population in a dynamical process. The depopulation proceeds through thermal processes.
机译：时间分辨Laue晶体学已被用于研究在中性到离子相变过程中光激发过程中一维有机导体（四硫富瓦烯-对氯甲腈）的结构动力学。激发具有800 nm，100 fs长的光脉冲的晶体系统，可在激发后最早在50 ps的时间内以至少10 ns的寿命超快填充结构中间体。从中性相开始，该中间体已被指定为离子相的光诱导种群的前体状态。观察到的强度变化与可比的平衡结构明显不同。该结构数据的解释是，在动态过程中，该中间体的潜力在其填充过程中被软化了。人口减少通过热处理进行。

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