X-ray diffractive imaging of controlled gas-phase molecules: Toward imaging of dynamics in the molecular frame
X-ray diffractive imaging of controlled gas-phase molecules: Toward imaging of dynamics in the molecular frame
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DOI：
10.1063/1.5133963
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发表时间：
2020-02-28
影响因子：
4.4
通讯作者：
Kuepper, Jochen
中科院分区：
文献类型：
--
作者：
Kierspel, Thomas;Morgan, Andrew;Kuepper, Jochen
我们报道了三维排列的2，5-二碘并噻吩分子的衍射成像实验结果。分子用啁啾近红外激光脉冲排列，并在直线加速器相干光源提供的9.5keV(波长约为130 PM)光子能量下探测其结构。在Cornell-SLAC像素阵列探测器上记录了衍射光子，并记录了2，5-二碘并噻吩二维相平衡结构的衍射图。两个碘原子之间的距离与量子化学计算的分子结构一致，在5%以内。这种实验方法允许在分子框架内对内在分子动力学进行成像，尽管这需要更多的实验数据，这些数据应该可以在即将到来的高重复率设备中随时获得。由AIP出版公司授权出版。
We report experimental results on the diffractive imaging of three-dimensionally aligned 2,5-diiodothiophene molecules. The molecules were aligned by chirped near-infrared laser pulses, and their structure was probed at a photon energy of 9.5 keV (lambda approximate to 130 pm) provided by the Linac Coherent Light Source. Diffracted photons were recorded on the Cornell-SLAC pixel array detector, and a two-dimensional diffraction pattern of the equilibrium structure of 2,5-diiodothiophene was recorded. The retrieved distance between the two iodine atoms agrees with the quantum-chemically calculated molecular structure to be within 5%. The experimental approach allows for the imaging of intrinsic molecular dynamics in the molecular frame, albeit this requires more experimental data, which should be readily available at upcoming high-repetition-rate facilities. Published under license by AIP Publishing.