2D H-bonding molecular magnets based on [Ni(mnt)2]- monoanion: Syntheses, crystal structures and magnetic properties

X. M. Ren, S. Nishihara, S. Noro, Tomoyuki Akutagawa, T. Nakamura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Two new H-bonding molecular magnets based on [Ni(mnt)2]- monoanion have been synthesized and characterized structurally. In crystal of 1, [Ni(mnt)2]- monoanions form the π-stacked sheets and the neighboring anionic sheets are held together via H-bonding interactions between -NH groups of diprotonated benzene-1,4-diamine and CN groups of mnt2- ligands. In crystal of 2, the neighboring anionic dimers form an anionic column via Ni...S contacting interactions, and these anionic stacks arrange into a sheet which is parallel to crystallographic ab-plane. The H-bonding interactions between diprotonated 1,4-diazabicyclo[2.2.2]octane cations and [Ni(mnt)2]- monoanions as well as between cations and solvent MeCN molecules stabilize the lattice. Magnetic susceptibility measurement for 1 indicates an activated magnetic behavior in the high-temperature range together with a Curie tail at the lower temperature range, but the magnetic feature deviates from the magnetic exchange model for a spin dimer with S = 1/2. The magnetic nature of 2 reveals the presence of strongly antiferromagnetic interactions between the nearest-neighboring spins, the larger energy gap between spin ground and excited states results in a weakly paramagnetic property.

Original languageEnglish
Pages (from-to)1787-1792
Number of pages6
JournalPolyhedron
Volume26
Issue number9-11
DOIs
Publication statusPublished - 2007 Jun 15
Externally publishedYes

Keywords

  • Bis(maleonitriledithiolato)nickelate compound
  • Crystal structure
  • H-bonding interaction
  • Magnetic property

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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