Chiral Induced Spin Selectivity Gives a New Twist on Spin-Control in Chemistry

Naaman, Ron; Paltiel, Yossi; Waldeck, David H.

doi:10.1021/acs.accounts.0c00485

Title: Chiral Induced Spin Selectivity Gives a New Twist on Spin-Control in Chemistry

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Abstract

The electron’s spin, its intrinsic angular momentum, is a quantum property that plays a critical role in determining the electronic structure of molecules. Despite its importance, it is not used often for controlling chemical processes, photochemistry excluded. The reason is that many organic molecules have a total spin zero, namely, all the electrons are paired. Even for molecules with high spin multiplicity, the spin orientation is usually only weakly coupled to the molecular frame of nuclei and hence to the molecular orientation. Therefore, controlling the spin orientation usually does not provide a handle on controlling the geometry of the molecular species during a reaction. About two decades ago, however, a new phenomenon was discovered that relates the electron’s spin to the handedness of chiral molecules and is now known as the chiral induced spin selectivity (CISS) effect. It was established that the efficiency of electron transport through chiral molecules depends on the electron spin and that it changes with the enantiomeric form of a molecule and the direction of the electron’s linear momentum. This property means that, for chiral molecules, the electron spin is strongly coupled to the molecular frame. Over the past few years, we and others have shownmore »« less

Authors:

^[1];

^[2];

^[3]

Department of Chemical and Biological Physics, Weizmann Institute, Rehovot 76100, Israel
Applied Physics Department and the Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Chemistry Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States

Publication Date:: Mon Oct 12 00:00:00 EDT 2020

Research Org.:: Univ. of Pittsburgh, PA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Science Foundation (NSF)

OSTI Identifier:: 1716530

Alternate Identifier(s):: OSTI ID: 1849787

Grant/Contract Number:: ER46430; FG02-07ER46430; BSF-1852588

Resource Type:: Published Article

Journal Name:: Accounts of Chemical Research

Additional Journal Information:: Journal Name: Accounts of Chemical Research Journal Volume: 53 Journal Issue: 11; Journal ID: ISSN 0001-4842

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemistry; Magnetic properties; Electrodes; Quantum mechanics; Molecular interactions; Molecules

Citation Formats


                    Naaman, Ron, Paltiel, Yossi, and Waldeck, David H. Chiral Induced Spin Selectivity Gives a New Twist on Spin-Control in Chemistry.  United States: N. p., 2020. 
Web.  doi:10.1021/acs.accounts.0c00485.

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                    Naaman, Ron, Paltiel, Yossi, & Waldeck, David H. Chiral Induced Spin Selectivity Gives a New Twist on Spin-Control in Chemistry.  United States.  https://doi.org/10.1021/acs.accounts.0c00485

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                    Naaman, Ron, Paltiel, Yossi, and Waldeck, David H. Mon .  
"Chiral Induced Spin Selectivity Gives a New Twist on Spin-Control in Chemistry".  United States.  https://doi.org/10.1021/acs.accounts.0c00485.

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@article{osti_1716530,

  title        = {Chiral Induced Spin Selectivity Gives a New Twist on Spin-Control in Chemistry},

  author       = {Naaman, Ron and Paltiel, Yossi and Waldeck, David H.},

  abstractNote = {The electron’s spin, its intrinsic angular momentum, is a quantum property that plays a critical role in determining the electronic structure of molecules. Despite its importance, it is not used often for controlling chemical processes, photochemistry excluded. The reason is that many organic molecules have a total spin zero, namely, all the electrons are paired. Even for molecules with high spin multiplicity, the spin orientation is usually only weakly coupled to the molecular frame of nuclei and hence to the molecular orientation. Therefore, controlling the spin orientation usually does not provide a handle on controlling the geometry of the molecular species during a reaction. About two decades ago, however, a new phenomenon was discovered that relates the electron’s spin to the handedness of chiral molecules and is now known as the chiral induced spin selectivity (CISS) effect. It was established that the efficiency of electron transport through chiral molecules depends on the electron spin and that it changes with the enantiomeric form of a molecule and the direction of the electron’s linear momentum. This property means that, for chiral molecules, the electron spin is strongly coupled to the molecular frame. Over the past few years, we and others have shown that this feature can be used to provide spincontrol over chemical reactions and to perform enantioseparations with magnetic surfaces. In this Account, we describe the CISS effect and demonstrate spin polarization effects on chemical reactions. Explicitly, we describe a number of processes that can be controlled by the electron’s spin, among them the interaction of chiral molecules with ferromagnetic surfaces, the multielectron oxidation of water, and enantiospecific electrochemistry. Interestingly, it has been shown that the effect also takes place in inorganic chiral oxides like copper oxide, aluminum oxide, and cobalt oxide. The CISS effect results from the coupling between the electron linear momentum and its spin in a chiral system. Understanding the implications of this interaction promises to reveal a previously unappreciated role for chirality in biology, where chiral molecules are ubiquitous, and opens a new avenue into spin-controlled processes in chemistry.},

  doi          = {10.1021/acs.accounts.0c00485},

  journal      = {Accounts of Chemical Research},

  number       = 11,

  volume       = 53,

  place        = {United States},

  year         = {Mon Oct 12 00:00:00 EDT 2020},

  month        = {Mon Oct 12 00:00:00 EDT 2020}

}

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