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 language | English |
|---|---|
| Pages (from-to) | 3481-3489 |
| Number of pages | 9 |
| Journal | Chemistry - A European Journal |
| Volume | 14 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Apr 7 2008 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Interpenetrated three-dimensional MnIIMIII ferrimagnets, [Mn(4dmap)4]3[M(CN)6] 2·10H2O (M = Cr, Mn)
T2 - Structures, magnetic properties, and pressure-responsive magnetic modulation
AU - Kaneko, Wakako
AU - Mito, Masaki
AU - Kitagawa, Susumu
AU - Ohba, Masaaki
PY - 2008/4/7
Y1 - 2008/4/7
N2 - 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.
AB - 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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U2 - 10.1002/chem.200701364
DO - 10.1002/chem.200701364
M3 - Article
C2 - 18283701
AN - SCOPUS:53849111921
VL - 14
SP - 3481
EP - 3489
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 11
ER -