Electron spin polarization in supramolecular polymers with complex pathways

Author:

Hong Kyeong-Im12ORCID,Kumar Abhinandan3ORCID,Garcia Ana M.1245ORCID,Majumder Subrata3ORCID,Ruiz-Carretero Amparo12ORCID

Affiliation:

1. Institute Charles Sadron, CNRS, UPR22, University of Strasbourg 1 , 23 Rue du Loess, 67034 Strasbourg Cedex 2, France

2. Institute for Advanced Study, University of Strasbourg 2 , 5 Allée du Général Rouvillois, F-67083 Strasbourg, France

3. Department of Physics, National Institute of Technology 3 , Patna 800005, India

4. Instituto Regional de Investigación Científica Aplicada (IRICA), Universidad de Castilla-La Mancha 4 , 13071 Ciudad Real, Spain and , 13071 Ciudad Real, Spain

5. Faculty of Chemical Science and Technology, Universidad de Castilla-La Mancha 4 , 13071 Ciudad Real, Spain and , 13071 Ciudad Real, Spain

Abstract

Mastering the manipulation of the electron spin plays a crucial role in comprehending the behavior of organic materials in several applications, such as asymmetric catalysis, chiroptical switches, and electronic devices. A promising avenue for achieving such precise control lies in the Chiral Induced Spin Selectivity (CISS) effect, where electrons with a favored spin exhibit preferential transport through chiral assemblies of specific handedness. Chiral supramolecular polymers emerge as excellent candidates for exploring the CISS effect due to their ability to modulate their helical structure through noncovalent interactions. In this context, systems capable of responding to external stimuli are particularly intriguing, sometimes even displaying chirality inversion. This study unveils spin selectivity in chiral supramolecular polymers, derived from single enantiomers, through scanning tunneling microscopy conducted in scanning tunneling spectroscopy mode. Following two distinct sample preparation protocols for each enantiomer, we generate supramolecular polymers with opposite handedness and specific spin transport characteristics. Our primary focus centers on chiral π-conjugated building blocks, with the aim of advancing novel systems that can inspire the organic spintronics community from a supramolecular chemistry level.

Funder

University of Strasbourg Institute for Advanced Science 2020

IdEx

Agence Nationale de la Recherche

Publisher

AIP Publishing

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy

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