One-dimensional end-to-end azide-bridged MnIII complexes incorporating alkali metal ions: Slow magnetic relaxations and metamagnetism

Jung Hee Yoon, Jin Wuk Lee, Dae Won Ryu, Sung Won Yoon, Byoung Jin Suh, Hyoung Chan Kim, Chang Seop Hong

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Three azide-bridged MnIII chains [Mn(3-MeOsalpn)(N 3)]-0.5AClO4 (A=Na (1), K (2), Rb (3); 3-MeOsalpn=N,Ń-propylenebis(3-methoxysalicylideneiminato) dianion) incorporating alkali metal ions and perchlorate anions were systematically synthesized. The overall structure can be described as a one-dimensional chain bridged by end-to-end azide ligands, although spatial arrangements of Jahn-Teller axes of Mn in 1 and 2 are different from that in 3. Relying on the alkali metal ions, magnetic properties are varied from a two-step phase transition (1) to metamagnetic transitions (2 and 3). In this system, spin canting definitely plays a central role in giving rise to the apparent slow magnetic relaxations in 1 and 2 because application of a high external magnetic field tends to destroy single-chain magnet (SCM) properties. Despite the existence of a long-range antiferromagnetic order at TN, slow magnetic relaxation is notably observed in 2, which likely emanates from the operative spin canting below TN.

Original languageEnglish
Pages (from-to)3028-3034
Number of pages7
JournalChemistry - A European Journal
Volume17
Issue number10
DOIs
Publication statusPublished - 2011 Mar 1

Keywords

  • azides
  • crystal engineering
  • magnetic properties
  • manganese
  • single-chain magnets

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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