Interpenetrated three-dimensional MnIIMIII ferrimagnets, [Mn(4dmap)4]3[M(CN)6] 2·10H2O (M = Cr, Mn): Structures, magnetic properties, and pressure-responsive magnetic modulation

Wakako Kaneko, Masaki Mito, Susumu Kitagawa, Masaaki Ohba

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Two novel cyanide-bridged ferrimagnets, [Mn(4dmap)4] 3[M(CN)6]2-·10 H2O (4dmap = 4-dimethylaminopyridine, M = Cr (1) and Mn (2)), have been prepared from the reaction of MnCl2·4H2O, a monodentate coligand (4dmap), with K3[M(CN)6]. X-ray crystallographic results show that these are isomorphous, and form a unique two-fold interpenetrated three-dimensional framework with a triconnected 6.102 net. The framework contains two types of one-dimensional channel: hexagonal channels based on a cyanide-bridged Mn6M6 hexagon, and triangle channels segmented by CN-Mn-NC linkages, which are filled with lattice water molecules. The dimethylamino groups of the 4dmap coligands are located around a pore and form the basic inner space. Variable-temperature X-ray powder diffraction and thermogravimetric analysis results show that the frameworks of both compounds are susceptible to dehydration through the loss of strongly hydrogen-bonded lattice water molecules. Magnetic measurements on both compounds show a ferrimagnetic ordering occurs at low temperature, Tc= 17 K for 1 and 6 K for 2. Application of hydrostatic pressure showed a positive effect on the magnetic ordering. Both values of Tc increased linearly, to 25 K for 1 and 15 K for 2 at 1.0 GPa. The magnetic properties of both compounds were reversibly modulated by the external stress.

Original languageEnglish
Pages (from-to)3481-3489
Number of pages9
JournalChemistry - A European Journal
Volume14
Issue number11
DOIs
Publication statusPublished - Apr 7 2008
Externally publishedYes

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Cyanides
Magnetic properties
Modulation
Molecules
Water
Magnetic variables measurement
Hydrostatic pressure
Dehydration
X ray powder diffraction
Thermogravimetric analysis
Hydrogen
Magnetization
X rays
Temperature
4-dimethylaminopyridine

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

Cite this

Interpenetrated three-dimensional MnIIMIII ferrimagnets, [Mn(4dmap)4]3[M(CN)6] 2·10H2O (M = Cr, Mn) : Structures, magnetic properties, and pressure-responsive magnetic modulation. / Kaneko, Wakako; Mito, Masaki; Kitagawa, Susumu; Ohba, Masaaki.

In: Chemistry - A European Journal, Vol. 14, No. 11, 07.04.2008, p. 3481-3489.

Research output: Contribution to journalArticle

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abstract = "Two novel cyanide-bridged ferrimagnets, [Mn(4dmap)4] 3[M(CN)6]2-·10 H2O (4dmap = 4-dimethylaminopyridine, M = Cr (1) and Mn (2)), have been prepared from the reaction of MnCl2·4H2O, a monodentate coligand (4dmap), with K3[M(CN)6]. X-ray crystallographic results show that these are isomorphous, and form a unique two-fold interpenetrated three-dimensional framework with a triconnected 6.102 net. The framework contains two types of one-dimensional channel: hexagonal channels based on a cyanide-bridged Mn6M6 hexagon, and triangle channels segmented by CN-Mn-NC linkages, which are filled with lattice water molecules. The dimethylamino groups of the 4dmap coligands are located around a pore and form the basic inner space. Variable-temperature X-ray powder diffraction and thermogravimetric analysis results show that the frameworks of both compounds are susceptible to dehydration through the loss of strongly hydrogen-bonded lattice water molecules. Magnetic measurements on both compounds show a ferrimagnetic ordering occurs at low temperature, Tc= 17 K for 1 and 6 K for 2. Application of hydrostatic pressure showed a positive effect on the magnetic ordering. Both values of Tc increased linearly, to 25 K for 1 and 15 K for 2 at 1.0 GPa. The magnetic properties of both compounds were reversibly modulated by the external stress.",
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