Magnetic properties of segregated layers containing MII 33-OH)2 (M = Co or Ni) diamond chains bridged by cis,cis,cis-1,2,4,5-cyclohexanetetracarboxylate

Mohamedally Kurmoo, Kazuya Otsubo, Hiroshi Kitagawa, Marc Henry, Masaaki Ohba, Seishi Takagi

研究成果: Contribution to journalArticle査読

11 被引用数 (Scopus)


We report the hydrothermal synthesis, X-ray crystal structures, and thermal, optical, and magnetic properties of two isostructural layered coordination polymers, [MII 5(OH)2(chtc) 2(H2O)10]·2H2O where M = Co (1Co) or Ni (2Ni) and chtc = cis,cis,cis-1,2,4,5-cyclohexanetetracarboxylate. The structures consist of segregated layers where each layer is formed of M 3(OH)2 diamond chains, involving edge-and corner-sharing octahedra, bridged by M(chtc)2. In the space created by the chains and the bridges exists channels, which house the coordinated and noncoordinated water molecules, all hydrogen bonded to form a dodecamer, with a central cyclohexane chair shape ring. Interestingly, the water molecules of 2Ni are more difficult to remove than those of 1Co, but pyrolysis of the latter takes place at higher temperature. The magnetic properties are characterized by Néel transition to fully compensated antiferromagnets at 5.8 K (1Co) and 3.0 K (2Ni). The moments are easily reversed in an applied field of 150 Oe (1Co) and 300 Oe (2Ni) to a ferrimagnet with one uncompensated moment followed by a nonlinear increase to a saturation corresponding to a ferrimagnet with three uncompensated moments. Further, point charge calculations to estimate the weak bonding energies between the various types of interaction are reported.

ジャーナルInorganic chemistry
出版ステータス出版済み - 10 18 2010

All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学
  • 無機化学


「Magnetic properties of segregated layers containing M<sup>II</sup> <sub>3</sub>(μ<sub>3</sub>-OH)<sub>2</sub> (M = Co or Ni) diamond chains bridged by cis,cis,cis-1,2,4,5-cyclohexanetetracarboxylate」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。