Transcription of chirality from metal–organic framework to polythiophene

Takashi Kitao, Yujiro Nagasaka, Masanobu Karasawa, Toshiki Eguchi, Nobuo Kimizuka, Kazuyuki Ishii, Teppei Yamada, Takashi Uemura

Research output: Contribution to journalArticle

Abstract

Here, we report an unprecedented chirality transfer from a metal–organic framework (MOF) to a polymer. In this work, unsubstituted polythiophene (PTh) was prepared in the nanochannels of a chiral MOF. Circular dichroism spectroscopy revealed that nanoconfinement of the polymer chains could endow optically inactive PTh with a chiral nature. The thickness of polymer chain assemblies could be controlled by tuning the loading amount of PTh, which resulted in a drastic change in the chiroptical properties. Note that PTh liberated from the host still exhibited chirality even without the chiral support. Remarkably, the recovered PTh presented high thermal stability of chirality up to 250 °C. Our findings show that the encapsulation of the polymer chains in chiral MOFs is a simple and effective methodology not only to express the chirality of polymers but also to elucidate the inter- and intrachain chirality in polymer assemblies.

Original languageEnglish
Pages (from-to)19565-19569
Number of pages5
JournalJournal of the American Chemical Society
Volume141
Issue number50
DOIs
Publication statusPublished - Jan 1 2020

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Kitao, T., Nagasaka, Y., Karasawa, M., Eguchi, T., Kimizuka, N., Ishii, K., ... Uemura, T. (2020). Transcription of chirality from metal–organic framework to polythiophene. Journal of the American Chemical Society, 141(50), 19565-19569. https://doi.org/10.1021/jacs.9b10880