Publication: Double-Helix Supramolecular Nanofibers Assembled from Negatively Curved Nanographenes

Kenta Kato, Kiyofumi Takaba, Saori Maki-Yonekura, Nobuhiko Mitoma, Yusuke Nakanishi, Taishi Nishihara, Taito Hatakeyama, Takuma Kawada, Yuh Hijikata, Jenny Pirillo, Lawrence T. Scott, Koji Yonekura,* Yasutomo Segawa,* Kenichiro Itami*

J. Am. Chem. Soc. 2021, DOI: 10.1021/jacs.1c00863

ChemRxiv, DOI: 10.26434/chemrxiv.13270607.v1

The layered structures of graphite and related nanographene molecules play key roles in their physical and electronic functions. However, the stacking modes of negatively curved nanographenes remain unclear, owing to the lack of suitable nanographene molecules. Herein, we report the synthesis and one-dimensional supramolecular self-assembly of negatively curved nanographenes without any assembly-assisting substituents. This curved nanographene self-assembles in various organic solvents and acts as an efficient gelator. The formation of nanofibers was confirmed by microscopic measurements, and an unprecedented double-helix assembly by continuous π–π stacking was uncovered by three-dimensional electron crystallography. This work not only reports the discovery of an all-sp2-carbon supramolecular π-organogelator with negative curvature but also demonstrates the power of three-dimensional electron crystallography for the structural determination of submicrometer-sized molecular alignment.

分子科学研究所 生命・錯体分子科学研究領域 錯体物性研究部門


山手キャンパス: 〒444-8787 愛知県岡崎市明大寺町字東山5-1

E-mail : segawa [at]

Segawa Group

IMS, Department of Life and Coordination-Complex Molecular Science, Complex Physical Properties

5-1 Higashiyama, Myodaiji, Okazaki, 444-8787, Japan

E-mail : segawa [at]

Copyright © Segawa Group 記載責任者:瀬川泰知