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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Time-Resolved Dynamics of NO2 in Its Conical Intersection Region
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Time-Resolved Dynamics of NO2 in Its Conical Intersection Region

机译：锥形相交区域中NO2的时间分辨动力学

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摘要

Photodissociation dynamics of NO2 in its conical intersection region have been explored experimentally on a real-time scale by time-of-flight mass spectrometry. Excited at 400.6 nm and probed by 801.6 nm femtosecond laser pulses, different dynamical behaviors of both the parent ion NO2 + and the fragment ion NO+ have been observed under parallel and perpendicular pump-probe laser polarization configurations. Distinct oscillations in NO2 + and NO+ signals are observed when laser polarizations of pump and probe are perpendicular to each other, whereas the oscillations become blurry when the laser polarizations are parallel. The observed transient signals imply that the dissociation mechanism of NO2 in the A2B2 excited state needed to be reconsidered. On the basis of our observation, Rydberg states play important roles in the ultrafast dissociation dynamics of NO2.
机译：通过飞行时间质谱在实时规模上实验性地探索了NO2在其锥形交叉区域的光解离动力学。在400.6 nm激发并被801.6 nm飞秒激光脉冲探测，在平行和垂直泵浦激光偏振配置下，观察到母离子NO2 +和碎片离子NO +的不同动力学行为。当泵和探头的激光偏振彼此垂直时，观察到NO2 +和NO +信号出现明显的振荡，而当激光偏振平行时，振荡变得模糊。观察到的瞬态信号暗示需要重新考虑处于A2B2激发态的NO2的分解机理。根据我们的观察，Rydberg州在NO2超快离解动力学中发挥重要作用。

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