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Open Access Chirality and Spin: A Different Perspective on Enantioselective Interactions

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This review describes a new perspective on the role that electron spin plays in the intermolecular forces between two chiral molecules and between chiral molecules and surfaces. This different role of the spin arises from the chiral induced spin selectivity (CISS) effect which is manifest when electrons are moving in chiral molecules. Namely, it has been shown that as chiral molecules are charge polarized, the electron displacement is accompanied by spin polarization. The spin direction associated with each electric pole depends on the specific handedness of the molecule. Thus, the consideration of the dispersive forces between two molecules, or between a molecule and a substrate, must include the spin polarization which adds an enantioselective electronic term to the interaction potential. We review recent experiments that show the relation between charge polarization and spin polarization in chiral molecules. The spin polarization also affects the direction of the ferromagnetic substrate magnetic moment of a surface, upon which the chiral molecules are adsorbed.

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Keywords: ENANTIOSPECIFIC; FERROMAGNET; HALL DEVICE; OLIGOPEPTIDE; SPIN POLARIZATION

Document Type: Research Article

Affiliations: 1: Department of Chemical and Biological Physics Weizmann Institute of Science, Rehovot Israel 76100;, Email: [email protected] 2: Applied Physics Department, Hebrew University Jerusalem, Israel 3: Department of Chemistry, University of Pittsburgh, Pittsburgh PA 15260

Publication date: June 1, 2018

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  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

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