Amplified Chirality Transfer to Aromatic Molecules through Non-specific Inclusion by Amorphous, Hyperbranched Poly(fluorenevinylene) Derivatives

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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Optically active, hyperbranched, poly(fluorene-2,4,7-triylethene-1,2-diyl) [poly(fluorenevinylene)] derivatives bearing a neomenthyl group and a pentyl group at the 9-position of the fluorene backbone at various ratios acted as a chirality donor (host polymers) efficiently included naphthalene, anthracene, pyrene, 9-phenylanthracene, and 9,10-diphenyanthracene as a chirality acceptor (guest molecules) in their interior space in film as well as in solution, with the guest molecules exhibiting intense circular dichroism through chirality transfer with chirality amplification. The efficiency of the chirality transfer was much higher with higher-molar-mass polymers than lower-molar-mass ones as well as with hyperbranched polymers compared to the analogous linear ones. The hyperbranched polymers include the small molecules in their complex structure without any specific interactions at various stoichiometries. The included molecules may have ordered intermolecular arrangement that may be somewhat similar to those of liquid crystals. Naphthalene, anthracene, and pyrene included in the polymer exhibited efficient circularly polarized luminescence, where the chirality was remarkably amplified in excited states, and anthracene exhibited especially high anisotropies in the emission on the order of 10−2.

Original languageEnglish
Article numbere202305747
JournalAngewandte Chemie - International Edition
Volume62
Issue number29
DOIs
Publication statusPublished - 2023 Jul 17

Keywords

  • Chirality
  • Circular Dichroism
  • Circularly Polarized Light
  • Polymers
  • Supramolecular Chemistry

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

Fingerprint

Dive into the research topics of 'Amplified Chirality Transfer to Aromatic Molecules through Non-specific Inclusion by Amorphous, Hyperbranched Poly(fluorenevinylene) Derivatives'. Together they form a unique fingerprint.

Cite this