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Updated: Jul 16, 2026

Electron Spin Resonance Micro-imaging of Live Species for Oxygen Mapping
Published on: August 26, 2010
Core electron transitions as a probe for molecular chirality: natural circular dichroism at the carbon K-edge of
Stefano Turchini1, Nicola Zema, Stefano Zennaro
1Istituto di Struttura della Materia CNR, Area della Ricerca di Roma1, CP 10, 00016 Monterotondo Stazione, Rome, Italy.
Abstract:
We have measured for the first time the X-ray natural circular dichroism (XNCD) of a chiral molecule in an isotropic medium. In this condition the only surviving term contributing to CD is the cross product between the electric dipole and the magnetic dipole transition moments. The non-zero value of the magnetic dipole transition moment in a 1s-to-valence electron transition is attributed to contribution of valence states to core molecular orbitals. These results open the way to a "local" chiral molecular analysis and to the study of stereochemically selected photochemical processes.
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