En-liangWang, Yu-feng Shi, Xu Shan, Hong-jiang Yang, Wei Zhang, Xiang-jun Chen. Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction[J]. Chinese Journal of Chemical Physics , 2014, 27(5): 503-511. doi: 10.1063/1674-0068/27/05/503-511
Citation: En-liangWang, Yu-feng Shi, Xu Shan, Hong-jiang Yang, Wei Zhang, Xiang-jun Chen. Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction[J]. Chinese Journal of Chemical Physics , 2014, 27(5): 503-511. doi: 10.1063/1674-0068/27/05/503-511

Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction

doi: 10.1063/1674-0068/27/05/503-511
  • Received Date: 2014-05-03
  • The binding energy spectrum and electron momentum distributions for the outer valence orbitals of n-propyl iodide molecule have been measured using the electron momentum spectrometer employing non-coplanar asymmetric geometry at impact energy of 2.5 keV plus binding energy. The ionization bands have been assigned in detail via the high accuracy SACCI general-R method calculation and the experimental momentum profiles are compared with the theoretical ones calculated by Hartree-Fock and B3LYP/aug-cc-pVTZ(C,H)6-311G??(I). The spin-orbit coupling effect and intramolecular orbital interaction have been analyzed for the outermost two bands, which are assigned to the iodine 5p lone pairs, using NBO method and non-relativistic as well as relativistic calculations. It is found that both of the interactions will lead to the observed differences in electron momentum distributions. The experimental results agree with the relativistic theoretical momentum profiles, indicating that the spin-orbit coupling effect dominates in n-propyl iodide molecule.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction

doi: 10.1063/1674-0068/27/05/503-511

Abstract: The binding energy spectrum and electron momentum distributions for the outer valence orbitals of n-propyl iodide molecule have been measured using the electron momentum spectrometer employing non-coplanar asymmetric geometry at impact energy of 2.5 keV plus binding energy. The ionization bands have been assigned in detail via the high accuracy SACCI general-R method calculation and the experimental momentum profiles are compared with the theoretical ones calculated by Hartree-Fock and B3LYP/aug-cc-pVTZ(C,H)6-311G??(I). The spin-orbit coupling effect and intramolecular orbital interaction have been analyzed for the outermost two bands, which are assigned to the iodine 5p lone pairs, using NBO method and non-relativistic as well as relativistic calculations. It is found that both of the interactions will lead to the observed differences in electron momentum distributions. The experimental results agree with the relativistic theoretical momentum profiles, indicating that the spin-orbit coupling effect dominates in n-propyl iodide molecule.

En-liangWang, Yu-feng Shi, Xu Shan, Hong-jiang Yang, Wei Zhang, Xiang-jun Chen. Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction[J]. Chinese Journal of Chemical Physics , 2014, 27(5): 503-511. doi: 10.1063/1674-0068/27/05/503-511
Citation: En-liangWang, Yu-feng Shi, Xu Shan, Hong-jiang Yang, Wei Zhang, Xiang-jun Chen. Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction[J]. Chinese Journal of Chemical Physics , 2014, 27(5): 503-511. doi: 10.1063/1674-0068/27/05/503-511

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