Multi-frequency high-field EPR study of (H+)(e−) pairs localized at the surface of polycrystalline MgO

Chiesa, M., Giamello, E., Annino, G., Massa, C. A. and Murphy, Damien Martin ORCID: https://orcid.org/0000-0002-5941-4879 2007. Multi-frequency high-field EPR study of (H+)(e−) pairs localized at the surface of polycrystalline MgO. Chemical Physics Letters 438 (4-6) , pp. 285-289. 10.1016/j.cplett.2007.03.024

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Abstract

The g-tensor of excess electron centres (H+)(e−) generated at the surface of polycrystalline MgO has been determined by multi-frequency, high-field electron-paramagnetic resonance (EPR) performed at 9.5, 34, 190 and 285 GHz. The A tensor for the interacting 1H was also determined by complementary Q-band electron-nuclear double resonance (ENDOR). Due to the high spectral resolution the anisotropy of the g-tensor could be fully resolved in the powder continuous-wave EPR spectrum. Computer simulation of the experimental data revealed small g-tensor anisotropies: Δgx = −0.00294, Δgy = −0.00286, Δgz = −0.00101, with Δgi = gi − 2.0023.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Subjects:	Q Science > QD Chemistry
Publisher:	Elsevier
ISSN:	0009-2614
Last Modified:	18 Oct 2022 13:12
URI:	https://orca.cardiff.ac.uk/id/eprint/12985

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