Imaging molecular geometry with electron momentum spectroscopy.

Imaging molecular geometry with electron momentum spectroscopy.
复制标题

利用电子动量谱对分子几何结构进行成像

DOI:
10.1038/srep39351
复制
发表时间:
2016-12-22
期刊:
影响因子:
4.6
通讯作者:
Chen X
Chen X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang E;Shan X;Tian Q;Yang J;Gong M;Tang Y;Niu S;Chen X

文献摘要

参考文献

被引文献

相似文献

电子动量谱是一种独特的成像工具,可以在动量空间中对分子的轨道电子密度进行成像。然而,由于分子轨道动量空间波函数的单中心特性,分子的几何信息往往被掩盖。在这里,我们演示了从具有对称和反对称特征的两个MO之间的电子动量分布比率中揭示的多中心干涉效应中检索原子间距离。观察到振荡周期对原子间距离的非常敏感的依赖性,该依赖性被用于以亚朗斯特伦的精度确定CF_4中的F-F距离和CO_2中的O-O距离。因此,使用一个光谱仪,在一次测量中,可以同时获得MO的电子密度分布和分子几何信息。我们的方法提供了一个新的强大的工具,成像分子具有高精度,并有可能适用于超快成像的分子动力学,如果结合超短电子脉冲在未来。
Electron momentum spectroscopy is a unique tool for imaging orbital-specific electron density of molecule in momentum space. However, the molecular geometry information is usually veiled due to the single-centered character of momentum space wavefunction of molecular orbital (MO). Here we demonstrate the retrieval of interatomic distances from the multicenter interference effect revealed in the ratios of electron momentum profiles between two MOs with symmetric and anti-symmetric characters. A very sensitive dependence of the oscillation period on interatomic distance is observed, which is used to determine F-F distance in CF4 and O-O distance in CO2 with sub-Ångström precision. Thus, using one spectrometer, and in one measurement, the electron density distributions of MOs and the molecular geometry information can be obtained simultaneously. Our approach provides a new robust tool for imaging molecules with high precision and has potential to apply to ultrafast imaging of molecular dynamics if combined with ultrashort electron pulses in the future.
DOI: 10.1038/ncomms8262
发表时间: 2015-06-24
影响因子: 16.6
作者:
Pullen, Michael G.;Wolter, Benjamin;Le, Anh-Thu;Baudisch, Matthias;Hemmer, Michael;Senftleben, Arne;Schroeter, Claus Dieter;Ullrich, Joachim;Moshammer, Robert;Lin, C. D.;Biegert, Jens
通讯作者: Biegert, Jens
DOI: 10.1073/pnas.1306697110
发表时间: 2013-09-17
影响因子: 11.1
作者:
Kushawaha, Rajesh Kumar;Patanen, Minna;Decleva, Piero
通讯作者: Decleva, Piero
DOI: 10.1063/1.438331
发表时间: 1979-01-01
影响因子: 4.4
作者:
FINK, M;SCHMIEDEKAMP, CW;GREGORY, D
通讯作者: GREGORY, D
DOI: 10.1103/physrevlett.100.133005
发表时间: 2008-04-04
影响因子: 8.6
作者:
Kreidi, K.;Akoury, D.;Doerner, R.
通讯作者: Doerner, R.
DOI: 10.1038/nature10820
发表时间: 2012-03-08
期刊: NATURE
影响因子: 64.8
作者:
Blaga, Cosmin I.;Xu, Junliang;Lin, C. D.
通讯作者: Lin, C. D.