Jump to main content
Jump to site search

Issue 44, 2017
Previous Article Next Article

Syntheses, structural diversity, magnetic properties and dye absorption of various Co(II) MOFs based on a semi-flexible 4-(3,5-dicarboxylatobenzyloxy)benzoic acid

Author affiliations

Abstract

Five novel Co(II) metal–organic frameworks (MOFs) constructed from semi-flexible 4-(3,5-dicarboxylatobenzyloxy)benzoic acid (H3L), namely {[Co1.5(HL)(4,4′-bidpe)2(H2O)]·3H2O}n (1), {[Co3(L)2(4,4′-bibp)32-O)2]·2H2O}n (2), {[Co(HL)(1,3-bitl)]·(1,4-Diox)}n (3), [Co2(HL)2(3,5-bipd)2]n (4), and {[Co(HL)(tib)]·0.5H2O·NMP}n (5) (4,4′-bidpe = 4,4′-bis(imidazolyl)diphenyl ether, 4,4′-bibp = 4,4′-bis(imidazol-1-yl)biphenyl, 1,3-bitl = 1,3-bis(1-imidazoly)toluene, 3,5-bipd = 3,5-bis(1-imidazoly)pyridine, and tib = 1,3,5-tris(1-imidazolyl)benzene), were synthesized under solvothermal conditions and further characterized by elemental analysis, IR spectra, powder X-ray diffraction (PXRD), thermogravimetric (TG) analysis and single-crystal X-ray diffraction. Different architectural topologies have been generated by adjusting the N-donor ligands. Single-crystal X-ray diffraction analysis reveals that complex 1 shows a rare 1D → 2D polyrotaxane network. Complex 2 possesses an unprecedented 2-nodal (3,10)-connected 3D framework with a Schläfli symbol of (43)2(46·632·83)(43)2. When the 2-connected points (H3L and 1,3-bitl ligands) are not calculated, complex 3 shows a hcb uninodal 3-connected 2D network with the Schläfli symbol (63), which further constructs a 3D supramolecular structure through O–H⋯O hydrogen bonds; while the 2-connected points are taken into account, complex 3 exhibits an unprecedented 3-nodal (2,2,4)-connected network. Complex 4 presents an unprecedented 2-nodal (3,5)-connected 3D framework with a (4·62)(4·66·83) topology, while complex 5 exhibits another unprecedented 2-nodal (3,5)-connected 2D framework with a (42·67·8)(42·6) Schläfli symbol and shows 2D → 3D supramolecular structure through O–H⋯O hydrogen bonds. Meanwhile, the magnetic properties of complexes 2 and 4 are discussed. Moreover, the dye adsorption and mechanism studies indicate that the pore size, the uncoordinated O atoms in carboxyl groups and the uncoordinated carboxyl groups of the MOFs have significant effects on the dye adsorption capacity.

Graphical abstract: Syntheses, structural diversity, magnetic properties and dye absorption of various Co(ii) MOFs based on a semi-flexible 4-(3,5-dicarboxylatobenzyloxy)benzoic acid

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Jul 2017, accepted on 04 Oct 2017 and first published on 04 Oct 2017


Article type: Paper
DOI: 10.1039/C7CE01229B
Citation: CrystEngComm, 2017,19, 6630-6643
  • Open access: Creative Commons BY license
  •   Request permissions

    Syntheses, structural diversity, magnetic properties and dye absorption of various Co(II) MOFs based on a semi-flexible 4-(3,5-dicarboxylatobenzyloxy)benzoic acid

    X. Meng, L. Cui, X. Wang, X. Zhang, X. Zhang and S. Bi, CrystEngComm, 2017, 19, 6630
    DOI: 10.1039/C7CE01229B

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements