Abstract
The electro-oxidative polymerization of an enantiopure chiral 3,4-ethylenedioxythiophene monomer, performed using spin-polarized currents, is shown to depend on the electron spin orientation. The spin-polarized current is shown to influence the initial nucleation rate of the polymerization reaction. This observation is rationalized in the framework of the chiral-induced spin selectivity effect.
Highlights
The investigation of electrochemical reactions under an applied magnetic field, magnetoelectrochemistry, has been growing over the past few decades
It is generally accepted that an external magnetic field can be used to affect kinetic parameters;[1,2] magnetic fields are not believed to provide an enantioselectivity for electrochemical reactions of chiral molecules.[3]
The recent discovery of the chiral-induced spin selectivity (CISS) effect,[4] which describes the enantiospecific interaction of chiral molecules and an electron’s spin, is refining our understanding of magnetic effects by revealing how magnetism might be used to introduce dissymmetry into electrochemical reactions
Summary
The investigation of electrochemical reactions under an applied magnetic field, magnetoelectrochemistry, has been growing over the past few decades. CISS-based studies show how an external magnetic field can be used to generate spin-polarized electrons from a ferromagnetic electrode, which are used to induce a chiral bias into redox reactions This approach has been applied to influence the efficiency of water-splitting reactions by manipulating the relative importance of singlet and triplet reaction pathways[5,6] and is the basis for a growing body of work called spin-dependent electrochemistry,[7−10] where the spin-polarization is used to govern enantioselective interactions.
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