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Synthesis and characterization of a porous magnetic diamond framework, Co3(HCOO)6, and its N2 sorption characteristic

Wang, Z., Zhang, B., Kurmoo, M., Green, M.A., Fujiwara, H., Otsuka, T., Kobayashi, H. (2005) Synthesis and characterization of a porous magnetic diamond framework, Co3(HCOO)6, and its N2 sorption characteristic. Inorganic Chemistry, 44 (5). pp. 1230-1237. ISSN 0020-1669. (doi:10.1021/ic048986r) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

[Co3(HCOO)6](CH3OH)(H2O) (1), the isostructural analogue of the porous magnet of coordination framework [Mn3(HCOO)6](CH3OH)(H2O), and its desolvated form [Co3(HCOO)6] (2) were prepared and characterized by X-ray and neutron diffraction methods, IR, thermal analyses, and BET, and their magnetic properties were measured. The parent compound, 1, crystallizes in the monoclinic system, space group P21/c, a = 11.254(2) �, b = 9.832(1) �, c = 18.108(3) �, β = 127.222(2)°, V = 1595.5(4) �3, Z = 4, R1 = 0.0329 at 180 K. It possesses a unit cell volume that is 9% smaller than [Mn3(HCOO) 6](CH3OH)(H2O) due to the smaller radius of Co2+ ion. Compared with the parent compound 1, the desolvated compound 2 has slightly larger lattice with cell parameters of a = 11.2858(4) �, b = 9.8690(4) �, c = 18.1797(6) �, β = 127.193(2)°, V = 1613.0(1) �3, R1 = 0.0356 at 180 K. The cell parameters of 2, obtained from neutron powder data at 2 K, are a = 11.309(2) �, b = 9.869(1) �, c = 18.201(3) �, β = 127.244(8)°, V = 1617.3(5) �3. The pore volume reduces from 33% to 30% by replacing Mn by Co. The material exhibits a diamond framework based on Co-centered CoCo4 tetrahedral nodes, in which all metal ions have octahedral coordination geometry and all HCOO groups link the metal ions in syn-syn/anti modes. It displays thermal stability up to 270°C. The compound easily loses guest molecules without loss of crystallinity, and it partly reabsorbs water from the atmosphere. Significant N2 sorption was observed for the desolvated framework suggesting that the material possesses permanent porosity. The magnetic properties show a tendency to a 3D long-range magnetic ordering, probably antiferromagnetic with a spin canting arrangement below 2 K. © 2005 American Chemical Society.

Item Type: Article
DOI/Identification number: 10.1021/ic048986r
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Inorg. Chem. [Field not mapped to EPrints] AD - Institute for Molecular Science, CREST, Japan, Sci. Technol. Coorporation, Okazaki 444-8585, Japan [Field not mapped to EPrints] AD - Coll. of Chem. and Molec. Eng., Peking University, Beijing 100871, China [Field not mapped to EPrints] AD - Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China [Field not mapped to EPrints] AD - Lab. de Chim. de Coord. Organique, UMR7140-CNRS, Institut Le Bel, 4 rue Blaise Pascal, 67000 Strasbourg Cedex, France [Field not mapped to EPrints] AD - Royal Institution of Great Britain, 21 Albemarle Street, London W1X 4BS, United Kingdom [Field not mapped to EPrints] AD - Department of Chemistry, University College of London, 20 Gordon Street, London WC1H OAJ, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: cobalt complex, manganese derivative, article, chemical analysis, crystal structure, infrared spectroscopy, magnetism, structure analysis, synthesis, thermal analysis
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 21 Oct 2015 15:31 UTC
Last Modified: 29 May 2019 16:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51118 (The current URI for this page, for reference purposes)
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