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Probing the coupling of a dipole-bound electron with a molecular core

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Abstract

A dipolar molecule can weakly bind an electron in a diffuse orbital. However, the spin–orbit coupling between this weakly bound electron and the electrons in the molecular core is not known. Here we probe this coupling using the linear C2P anion with the 3Σ+ ground state, which possesses dipole-bound excited states because neutral C2P (2Π) has a sufficiently large dipole moment. Photodetachment spectroscopy and resonant photoelectron spectroscopy are used to probe the nature of the dipole-bound states. Two dipole-bound excited states are observed with a binding energy of 37 cm−1, corresponding to the two spin–orbit states of neutral C2P (2Π1/2 and 2Π3/2). The current study demonstrates that the weakly bound electron in the dipole-bound excited states of C2P is not spin-coupled to the electrons in the C2P core and can be considered as a quasi-free electron.

Graphical abstract: Probing the coupling of a dipole-bound electron with a molecular core

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Publication details

The article was received on 26 Oct 2018, accepted on 15 Nov 2018 and first published on 15 Nov 2018


Article type: Edge Article
DOI: 10.1039/C8SC04771E
Citation: Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY license
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    Probing the coupling of a dipole-bound electron with a molecular core

    J. Czekner, L. F. Cheung, G. S. Kocheril and L. Wang, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C8SC04771E

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