Electron spin polarization in supramolecular polymers with complex pathways

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 Induce...

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Bibliographic Details
Published in:The Journal of chemical physics 2023-09, Vol.159 (11)
Main Authors: Hong, Kyeong-Im, Kumar, Abhinandan, Garcia, Ana M., Majumder, Subrata, Ruiz-Carretero, Amparo
Format: Article
Language:English
Subjects:
Chemical Sciences
Chirality
Electron spin
Electrons
Enantiomers
Organic materials
Polarization (spin alignment)
Polymers
Scanning tunneling microscopy
Spintronics
Supramolecular polymers
Switches
Transport properties
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Summary: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.
ISSN:0021-9606
1089-7690
1089-7690
DOI:10.1063/5.0164825