Selective Ion Exchange in Supramolecular Channels in the Crystalline State

Katsuya Ichihashi, Daisuke Konno, Kseniya Yu Maryunina, Katsuya Inoue, Kazuhiro Toyoda, Shogo Kawaguchi, Yoshiki Kubota, Yoko Tatewaki, Tomoyuki Akutagawa, Takayoshi Nakamura, Sadafumi Nishihara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Artificial ion channels are of increasing interest because of potential applications in biomimetics, for example, for realizing selective ion permeability through the transport and/or exchange of selected ions. However, selective ion transport and/or exchange in the crystalline state is rare, and to the best of our knowledge, such a process has not been successfully combined with changes in the physical properties of a material. Herein, by soaking single crystals of Li 2 ([18]crown-6) 3 [Ni(dmit) 2 ] 2 (H 2 O) 4 (1) in an aqueous solution containing K + , we succeeded in complete ion exchange of the Li + ions in 1 with K + ions in the solution, while maintaining the crystalline state of the material. This ion exchange with K + was selectively conducted even in mixed solutions containing K + as well as Na + /Li + . Furthermore, remarkable changes in the physical properties of 1 resulted from the ion exchange. Our finding enables not only the realization of selective ion permeability but also the development of highly sensitive biosensors and futuristic ion exchange agents, for example.

Original languageEnglish
Pages (from-to)4169-4172
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number13
Publication statusPublished - 2019 Mar 22


  • ion channels
  • ion exchange
  • lithium
  • magnetic properties
  • solid-state structures


Dive into the research topics of 'Selective Ion Exchange in Supramolecular Channels in the Crystalline State'. Together they form a unique fingerprint.

Cite this