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Issue 5, 2019

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

Supplementary files

Article information


Submitted
26 Oct 2018
Accepted
15 Nov 2018
First published
15 Nov 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 1386-1391
Article type
Edge Article

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, 10, 1386 DOI: 10.1039/C8SC04771E

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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