Enhancement of ionic conductivity in organic ionic plastic crystals by introducing racemic ammonium ions

Masaya Matsuki, Teppei Yamada, Shun Dekura, Hiroshi Kitagawa, Nobuo Kimizuka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An organic ionic plastic crystal (OIPC) consisting of racemic N1233'Tf2N (1) (N1233' = NR1R2R3R4, R1 = Me, R2 = Et, R3 = n-propyl, R4 = isopropyl, Tf2N = bis(trifluorometha-nesulfonyl)imide) is developed. 1 displays three solid phases in addition to the high-temperature liquid phase, and two intermediate phases are assigned to OIPC by DSC, powder XRD and solid-state NMR measurements. Ionic conductivity of 1 showed increase from the low-temperature region, and diffusion of Tf2N anions was confirmed even at -27°C by NMR spectroscopy. This behavior is distinct from that of symmetric N1223'Tf2N (2), which showed much lower ionic conductivity at low temperatures. The introduction of racemic ions in OIPCs weakens the net intermolecular interactions and it enhances molecular motion and accordingly the ionic conductivity.

Original languageEnglish
Pages (from-to)497-499
Number of pages3
JournalChemistry Letters
Volume47
Issue number4
DOIs
Publication statusPublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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