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Separation of enantiomers by their enantiospecific interaction with achiral magnetic substrates
, O.B. Dor, F. Tassinari, E. Capua, S. Yochelis, A. Capua, S.-H. Yang, S.S.P. Parkin, S. Sarkar, L. KronikShow More
Published in American Association for the Advancement of Science
2018
PMID: 29748324
Volume: 360
   
Issue: 6395
Pages: 1331 - 1334
Abstract
It is commonly assumed that recognition and discrimination of chirality, both in nature and in artificial systems, depend solely on spatial effects. However, recent studies have suggested that charge redistribution in chiral molecules manifests an enantiospecific preference in electron spin orientation. We therefore reasoned that the induced spin polarization may affect enantiorecognition through exchange interactions. Here we show experimentally that the interaction of chiral molecules with a perpendicularly magnetized substrate is enantiospecific. Thus, one enantiomer adsorbs preferentially when the magnetic dipole is pointing up, whereas the other adsorbs faster for the opposite alignment of the magnetization. The interaction is not controlled by the magnetic field per se, but rather by the electron spin orientations, and opens prospects for a distinct approach to enantiomeric separations. © The Authors.
About the journal
JournalData powered by TypesetScience
PublisherData powered by TypesetAmerican Association for the Advancement of Science
ISSN00368075