Helically aligned fused carbon hollow nanospheres with chiral discrimination ability

Jun Maruyama, Shohei Maruyama, Yukiyasu Kashiwagi, Mitsuru Watanabe, Tsutomu Shinagawa, Toru Nagaoka, Toshiyuki Tamai, Naoya Ryu, Koichi Matsuo, Mao Ohwada, Koki Chida, Takeharu Yoshii, Hirotomo Nishihara, Fumito Tani, Hiroshi Uyama

Research output: Contribution to journalArticlepeer-review

Abstract

While the functions of carbon materials with precisely controlled nanostructures have been reported in many studies, their chiral discriminating abilities have not been reported yet. Herein, chiral discrimination is achieved using helical carbon materials devoid of chiral attachments. A Fe3O4 nanoparticle template with ethyl cellulose (carbon source) is self-assembled on dispersed multiwalled carbon nanotubes (MWCNTs) fixed in a lamellar structure, with helical nanoparticle alignment induced by the addition of a binaphthyl derivative. Carbonization followed by template removal produces helically aligned fused carbon hollow nanospheres (CHNSs) with no chiral molecules left. Helicity is confirmed using vacuum-ultraviolet circular dichroism spectroscopy. Chiral discrimination, as revealed by the electrochemical reactions of binaphthol and a chiral ferrocene derivative in aqueous and nonaqueous electrolytes, respectively, is attributable to the chiral space formed between the CHNS and MWCNT surfaces.

Original languageEnglish
Pages (from-to)3748-3757
Number of pages10
JournalNanoscale
Volume14
Issue number10
DOIs
Publication statusPublished - Feb 9 2022

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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