Spin Filtering in Supramolecular Polymers Assembled from Achiral Monomers Mediated by Chiral Solvents

Amit Kumar Mondal, Marco Preuss, Marcin L. Ślęczkowski, Tapan Kumar Das, Ghislaine M.E. Vantomme, E.W. (Bert) Meijer (Corresponding author), Ron Naaman

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

In past studies, spin selective transport was observed in polymers and supramolecular structures that are based on homochiral building blocks possessing stereocenters. Here we address the question to what extent chiral building blocks are required for observing the chiral induced spin selectivity (CISS) effect. We demonstrate the CISS effect in supramolecular polymers exclusively containing achiral monomers, where the supramolecular chirality was induced by chiral solvents that were removed from the fibers before measuring. Spin-selective transport was observed for electrons transmitted perpendicular to the fibers’ long axis. The spin polarization correlates with the intensity of the CD spectra of the polymers, indicating that the effect is nonlocal. It is found that the spin polarization increases with the samples’ thickness and the thickness dependence is the result of at least two mechanisms: the first is the CISS effect, and the second reduces the spin polarization due to scattering. Temperature dependence studies provide the first support for theoretical work that suggested that phonons may contribute to the spin polarization.
Original languageEnglish
Pages (from-to)7189–7195
Number of pages7
JournalJournal of the American Chemical Society
Volume143
Issue number18
DOIs
Publication statusPublished - 30 Apr 2021

Keywords

  • Thickness
  • Solvents
  • quantum mechanics
  • polarization
  • Polymers
  • CISS

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