Spin dependent electrochemistry: Focus on chiral vs achiral charge transmission through 2D SAMs adsorbed on gold

Innocenti, Massimo; Passaponti, Maurizio; Giurlani, Walter; Giacomino, Agnese; Pasquali, Luca; Giovanardi, Roberto; Fontanesi, Claudio

doi:10.1016/j.jelechem.2019.113705

Cited by 10 publications

(6 citation statements)

References 71 publications

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“…Similar results are observed in the electropolymerization of organic compounds too, where asymmetric induction is observed in the polyaniline electropolymerization under high magnetic fields [23]. The importance of these studies rests in the possible use of these materials as catalysts and sensors in the field of enantiorecognition [24][25][26][27][28][29][30][31][32].…”

Section: Magnetic Effect In Electrochemistrysupporting

confidence: 70%

Magnetic Field Effect on the Handedness of Electrodeposited Heusler Alloy

et al. 2022

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Magneto-electrochemistry (MEC) experiments were carried out in the electrodeposition of a ferromagnetic Heusler alloy. The electrodeposition was carried out in the absence (as a reference) and in the presence of a magnetic field that was applied perpendicularly to the electrode–solution interface. The obtained metallic deposit was characterized by SEM-EDS, XRF, and XRD techniques. The ferromagnetic properties are assessed on the basis of SQUID measurements. The experimental results indicate that the influence of the presence of the magnetic field induces differences in the electrochemical measurements and a macroscopic handedness (chirality) in the deposit, which is a function of magnet orientation. Eventually, the coercivity of the Heusler alloy that was obtained in the presence of the magnetic field was larger compared to that of the deposit that was obtained without a magnetic field.

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Section: Magnetic Effect In Electrochemistrysupporting

confidence: 70%

Magnetic Field Effect on the Handedness of Electrodeposited Heusler Alloy

et al. 2022

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“…Since the chirality is a common feature of many chemical and most biochemical systems, possibly the extent of OPE may be larger than one can imagine from the CISS, which calls for further investigations. Our work may provide a topological perspective to understand the fundamental role of chirality in the biological (94) and chemical (38,95) systems.…”

Section: Discussionmentioning

confidence: 98%

Chirality-driven topological electronic structure of DNA-like materials

et al. 2021

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Topological aspects of the geometry of DNA and similar chiral molecules have received a lot of attention, while the topology of their electronic structure is less explored. Previous experiments have revealed that DNA can efficiently filter spin-polarized electrons between metal contacts, a process called chiral-induced spin-selectivity (CISS). However, the underlying correlation between chiral structure and electronic spin remains elusive. In this work, we reveal an orbital texture in the band structure, a topological characteristic induced by the chirality. We find that this orbital texture enables the chiral molecule to polarize the quantum orbital. This orbital polarization effect (OPE) induces spin polarization assisted by the spin-orbit interaction from a metal contact and leads to magnetorestistance and chiral separation. The orbital angular momentum of photoelectrons also plays an essential role in related photoemission experiments. Beyond CISS, we predict that OPE can induce spin-selective phenomena even in achiral but inversion-breaking materials.

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“…In that, the physics underlying optical rotation and spin‐dependent charge transport properties seems to be strictly related, possibly being a molecular‐related manifestation of the “chirality” of a system. [ 22,68 ] Figure A sets out the relevant experimental set‐up used for conducting probe CP‐AFM measurements in the presence of a magnetic field. The ferromagnetic electrode surface is magnetized in two different orientations using a permanent magnet placed underneath the ferromagnetic surface: field‐up (North‐up) or field‐down (North‐down) during CP‐AFM measurements.…”

Section: Resultsmentioning

confidence: 99%

Exchange Interactions Drive Supramolecular Chiral Induction in Polyaniline

et al. 2020

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The focus of this paper is on the intermolecular interaction active between polyaniline (PANI) and 10-camphorsulfonic acid (10CSA). Enantiopure 10CSA, present in the electropolymerization solution, promotes chiral induction in the supramolecular polyaniline polymer (cPANI). Tight integration of experimental data (circular dichroism, CD, near edge X-ray absorption spectra, NEXAFS, conductive probe atomic force microscopy, CP-AFM) and theoretical [density functional theory, (DFT)] results allows to unfold the nature of the electronic interaction between PANI and 10CSA and to shed light on the physical interactions inducing the chiral character to bulk pristine non-chiral PANI: eventually yielding cPANI. The electropolymerization follows a "wet chemistry" method: electrochemical polymerization of aniline in the co-presence in bulk solution of enantiopure 10-camphorsulfonic acid (10CSA). The latter is exploited as chirality inductor. The method of integration between experimental results with ab-initio theoretical calculations, strongly suggests that the chiral induction exerted by the CSA stems from exchange interaction between CSA and PANI.

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Spin dependent electrochemistry: Focus on chiral vs achiral charge transmission through 2D SAMs adsorbed on gold

Cited by 10 publications

References 71 publications

Magnetic Field Effect on the Handedness of Electrodeposited Heusler Alloy

Magnetic Field Effect on the Handedness of Electrodeposited Heusler Alloy

Chirality-driven topological electronic structure of DNA-like materials

Exchange Interactions Drive Supramolecular Chiral Induction in Polyaniline

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