Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19753
Title: A new metal organic framework constructed of Co(II) ions six and seven-coordinated: Synthesis, structure and magnetism
Author: Pedro, S. S.
Brandao, P.
Shi, F. -N.
Tedesco, J. C. G.
Reis, M. S.
Keywords: CRYSTAL-STRUCTURES
COMPLEXES
LIGAND
COORDINATION
CHLORIDE
POLYMER
NETS
Issue Date: 2014
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Abstract: In this work are presented the synthesis, structure and magnetic measurements for the [Co(mu(2)-biim)(6) 2Co(mu-H2O)(OH)(6)] (biim = 2,2'-biimidazole) metal-organic framework. The compound crystallizes in the cubic system, space group Pa (3) over bar (a = 16.0312(6) angstrom, V = 4120.0(3) angstrom(3) and Z = 4), containing two crystallo-graphically distinct divalent cobalt ions Co(1) and Co(2) six- and seven-coordinated, respectively. The two metal centers are linked by 2,2'-biimidazole bridging ligand through the N(6) nitrogen donor and Co(2) forming a dimer via bridged water molecule with Co-Co distance of 4.313(3) angstrom, originating a 3D structure. Topological analysis of this compound revealed that the structure is an abi-nodal 3,4-connected network with total point symbol {8(3)}{8(6)}. By fitting of susceptibility data to the Curie-Weiss law it was possible to estimate the magnetic parameters theta(p) and p(eff). Magnetic susceptibility results suggest an antiferromagnetic order in the system. (C) 2014 Elsevier Ltd. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10773/19753
DOI: 10.1016/j.poly.2014.06.018
ISSN: 0277-5387
Publisher Version: 10.1016/j.poly.2014.06.018
Appears in Collections:CICECO - Artigos



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