Synthesis of ternary and quaternary graphite intercalation compounds containing alkali metal cations and diamines

Tosapol Maluangnont, Michael M. Lerner, Kazuma Gotoh

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A series of ternary graphite intercalation compounds (GICs) of alkali metal cations (M = Li, Na, K) and diamines [EN (ethylenediamine), 12DAP (1,2-diaminopropane), and DMEDA (N,N-dimethylethylenediamine)] are reported. These include stage 1 and 2 M-EN-GIC (M = Li, di = 0.68-0.84 nm; M = Na, di = 0.68 nm), stage 2 Li-12DAP-GIC (di = 0.83 nm), and stage 1 and 2 Li-DMEDA-GIC (di = 0.91 nm), where di is the gallery height. For M = Li, a perpendicular-to-parallel transition of EN is observed upon evacuation, whereas for M = Na, the EN remains in parallel orientation. Li-12DAP-GIC and Li-DMEDA-GIC contain chelated Li+ and do not show the perpendicular-to-parallel transition. We also report the quaternary compounds of mixed cations (Li,Na)-12DAP-GIC and mixed amines Na-(EN,12DAP)-GIC, with di values in both cases between those of the ternary end members. (Li,Na)-12DAP-GIC is a solid solution with lattice dimensions dependent on composition, whereas for Na-(EN,12DAP)-GIC, the lattice dimension does not vary with amine content.

Original languageEnglish
Pages (from-to)11676-11682
Number of pages7
JournalInorganic Chemistry
Issue number22
Publication statusPublished - Nov 21 2011


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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