| Pressure response of three-dimensional cyanide-bridged bimetallic magnets. | |
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MedLine Citation:
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PMID: 18331039 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Effects of pressure on the structures and magnetic properties of three types of 3-D cyanide-bridged bimetallic coordination polymer magnets, MnIICrIII ferrimagnet [Mn(en)]3[Cr(CN)6]2.4H2O (1; en = ethylenediamine), NiIICrIII ferromagnet [Ni(dipn)]3[Cr(CN)6]2.3H2O (2; dipn = N,N-di(3-aminopropyl)amine), and NiIIFeIII ferromagnet [Ni(dipn)]2[Ni(dipn)(H2O)][Fe(CN)6]2.11H2O (3), were systematically examined under hydrostatic pressure up to 19.8 GPa using a piston-cylinder-type pressure cell and a diamond anvil cell. The ferrimagnet 1 showed the reversible crystalline-to-amorphous-like phase change, and the magnetic phase transition temperature (TC) was reversibly changed from 69 K at 0 GPa to 126 K at 4.7 GPa. At higher pressure, the net magnetization was suppressed with increasing pressure, and the magnetic state at 19.8 GPa was assumed to be paramagnetic. The initial ferrimagnetic phase of 1 was not recovered after releasing the pressure from 19.8 GPa. The magnetic phase of 2 was reversibly converted between ferromagnetic and paramagnetic-like phase in the range 0 </= P </= 4.7 GPa while maintaining its crystallinity. The porous ferromagnet 3 was easily amorphized and irreversibly lost the ferromagnetic phase under low pressure (P </= 1.0 GPa). The flexible cyanide-bridged magnetic frameworks demonstrate well the pressure response as a reflection of differences in the magnetic structure and the framework strength in the GPa range. |
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Authors:
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Masaaki Ohba; Wakako Kaneko; Susumu Kitagawa; Takuho Maeda; Masaki Mito |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-03-11 |
Journal Detail:
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Title: Journal of the American Chemical Society Volume: 130 ISSN: 1520-5126 ISO Abbreviation: J. Am. Chem. Soc. Publication Date: 2008 Apr |
Date Detail:
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Created Date: 2008-03-26 Completed Date: 2008-04-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503056 Medline TA: J Am Chem Soc Country: United States |
Other Details:
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Languages: eng Pagination: 4475-84 Citation Subset: IM |
Affiliation:
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Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. ohba@sbchem.kyoto-u.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Chromium
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chemistry* Cyanides / chemistry* Ligands Magnetics* Metals, Heavy / chemistry* Models, Molecular Organometallic Compounds / chemistry* Powder Diffraction Pressure Propylamines / chemistry Temperature |
| Chemical | |
Reg. No./Substance:
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0/Cyanides; 0/Ligands; 0/Metals, Heavy; 0/N,N-di(3-aminopropyl)amine; 0/Organometallic Compounds; 0/Propylamines; 7440-47-3/Chromium |
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