Highlighting spin selectivity properties of chiral electrode surfaces from redox potential modulation of an achiral probe under applied magnetic field
Articolo
Data di Pubblicazione:
2019
Citazione:
Highlighting spin selectivity properties of chiral electrode surfaces from redox potential modulation of an achiral probe under applied magnetic field / T. Benincori, S. Arnaboldi, M. Magni, S. Grecchi, C. Fontanesi, P.R. Mussini. - In: CHEMICAL SCIENCE. - ISSN 2041-6520. - 10:9(2019 Jan), pp. 2750-2757. [10.1039/C8SC04126A]
Abstract:
Impressive spin-related effects are observed in cyclic voltammetry (CV) experiments performed under applied magnetic field on a non-ferromagnetic electrode modified with a thin electroactive oligothiophene film, either "inherently chiral" or featuring chiral pendants with stereogenic centres. By flipping the magnet north/south orientation, the CV peaks of two achiral, chemically reversible Fe(III)/Fe(II) redox couples in aqueous or organic solution undergo impressive potential shifts (up to nearly 0.5 V depending on protocol conditions), specularly by changing the film (R)- or (S)-configuration. The magnitude of the potential shift decreases both increasing the polymer film thickness and the distance between the permanent magnet from the electrode surface. Such unprecedented spin-related redox potential modulation, obtained in the absence of a magnetic electrode acting as spin injector, provides a striking evidence (as well as an attractive evaluation criterion) of the spin selectivity properties of chiral thin films.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
T. Benincori, S. Arnaboldi, M. Magni, S. Grecchi, C. Fontanesi, P.R. Mussini
Link alla scheda completa:
Link al Full Text: