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- Title
Interpenetrated Double Pillared-Layer Co<sup>II</sup> MOFs with pcu Topology.
- Authors
In-Hyeok Park; Yunji Kang; Eunji Lee; Chanthapally, Anjana; Shim Sung Lee; Vittal, Jagadese J.
- Abstract
Three double pillared-layer CoII metal-organic frameworks (MOFs) with a pcu topology of a long, conformationally flexible, dipyridyl spacer ligand, 1,4-bis[2-(4-pyridyl)ethenyl]benzene (bpeb), and aromatic dicarboxylates (1,4-benzenedicarboxylate (bdc), 2,6-naphthalenedicarboxylate (ndc), and biphenyl-4,40-dicarboxylate (bpdc)) have been synthesised and structurally characterised by X-ray crystallography. The MOFs are denoted as [Co2(bpeb)2(bdc)2]⋅DMF⋅3H2O (1), [Co2(bpeb)2(ndc)2]⋅1.75DMF_3.75H2O (2), and [Co2(bpeb)2(bpdc)2]⋅3.5DMF⋅4H2O (3). In the dinuclear repeating unit, four carboxylates are bonded to two CoII atoms forming a (4,4) layer structure. The axial positions are occupied by bpeb ligands. Of these, 1 and 2 have 2-fold interpenetration, whereas 3 displays 3-fold interpenetration. The two bpeb space ligands in 1 have trans,trans,trans and trans,cis,trans conformations. In contrast, the bpeb ligands in 2 and 3 have a trans,cis,trans conformation. Although the olefin groups in two adjacent bpeb ligands, as the double pillars in 2 and 3, satisfy the conditions for photo-dimerisation to occur, they are photo-inactive. The conformational changes of bpeb, bonding modes of the dicarboxylates, and pore sizes in these double pillared-layer compounds have been discussed.
- Subjects
CHEMICAL synthesis; METAL-organic frameworks; AROMATIC compounds
- Publication
Australian Journal of Chemistry, 2017, Vol 70, Issue 5, p461
- ISSN
0004-9425
- Publication type
Article
- DOI
10.1071/CH16438