Synthesis, structure, and magnetic properties of Li-doped manganese-phthalocyanine, Lix[MnPc] (0 ≤ × ≤ 4)

Yasujiro Taguchi, Toshiaki Miyake, Serena Margadonna, Kenichi Kato, Kosmas Prassides, Yoshihiro Iwasa

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

We report on the first synthesis of Li-intercalated manganese- phthalocyanine (MnPc) in the bulk form and on the evolution of the structural and magnetic properties as a function of Li concentration, x. We find that solid β-MnPc, which comprises rodlike assemblies of individual planar molecules, is best described as a glassy one-dimensional ferromagnet without three-dimensional ordering and that it can be quasi-continuously intercalated with Li up to x = 4, forming an isosymmetrical series of Lix[MnPc] phases. Inserted Li+ ions strongly bond to pyrrole-bridging nitrogen atoms of the Pc rings, thereby disrupting the ferromagnetic Mn-N a⋯Mn superexchange pathways. This gradually induces a crossover of the intrachain exchange interactions from ferromagnetic to antiferromagnetic as the doping level, x, increases coupled with a spin-state transition of the Mn2+ ions from intermediate spin, S = 3/2, to high spin, S = 5/2.

Original languageEnglish
Pages (from-to)3313-3323
Number of pages11
JournalJournal of the American Chemical Society
Volume128
Issue number10
DOIs
Publication statusPublished - 2006 Mar 15

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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