Non-uniform Self-folding of Helical Poly(fluorenevinylene) Derivatives in the Solid State Leading to Amplified Circular Dichroism and Circularly Polarized Light Emission

Pengfei Wu, Adriana Pietropaolo, Mariagrazia Fortino, Shuhei Shimoda, Katsuhiro Maeda, Tatsuya Nishimura, Masayoshi Bando, Naofumi Naga, Tamaki Nakano

Research output: Contribution to journalArticlepeer-review

Abstract

An unprecedented non-uniform self-folding of artificial polymer chains composed of turn moieties and stretched segments is presented through the design of a set of optically active poly(fluorene-2,7-diylethene-1,2-diyl) (poly(fluorenevinylene)) derivatives bearing a neomenthyl group and a pentyl group attached at the 9-position of fluorene backbone at various ratios. The folded structure is formed and stabilized through inter-chain interactions in the solid state, leading to remarkably enhanced chiroptical properties (chirality amplification) in terms of circular dichroism (CD) and circularly polarized light (CPL) emission. This phenomenon is rationalized by experimental and theoretical CD and CPL spectral analyses. The polymer arrangements in the solid state were further assessed through transmission electron microscopic observations combined with enhanced sampling molecular dynamics simulations in the solid state revealing the thin film organizations.

Original languageEnglish
Article numbere202210556
JournalAngewandte Chemie - International Edition
Volume61
Issue number43
DOIs
Publication statusPublished - 2022 Oct 24

Keywords

  • Chirality Amplification
  • Chirality Transfer
  • Circularly Polarized Light
  • Helix
  • Self-Folding

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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