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Issue 21, 2014
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The various architectures and properties of a series of coordination polymers tuned by the central metals

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Abstract

Five new metal–organic coordination polymers based on the mixed ligands of a semi-rigid bis-pyridyl-bis-amide N,N′-bis(3-pyridinecarboxamide)-1,2-cyclohexane (3-bpah) and 1,4-benzenedicarboxylic acid (1,4-H2BDC), namely [Co(3-bpah)(1,4-BDC)(H2O)3] (1), [Ni(3-bpah)(1,4-BDC)(H2O)3] (2), [Cu(3-bpah)(1,4-BDC)] (3), [Zn(3-bpah)(1,4-BDC)]·H2O (4) and [Cd(3-bpah)(1,4-BDC)(H2O)] (5), have been hydrothermally synthesized and structurally characterized. Complexes 1 and 2 are isostructural and display the similar 1D infinite chains, which are further linked via hydrogen-bonding interactions to generate 3D supramolecular frameworks. Complex 3 features a 3D polymeric framework with CdSO4-like topology. Complexes 4 and 5 show two similar 2D (2,4)-connected networks with (4·85)(4) topology, in which the 3-bpah ligands adopt different μ2-bridging coordination modes via the ligation of two pyridyl nitrogen atoms in 4 and via the ligation of one pyridyl nitrogen and one amide oxygen atom in 5. In addition, the central metals show different coordination geometries in 4 and 5. The adjacent layers of complexes 4 and 5 are finally extended into 3D supramolecular architectures through hydrogen-bonding interactions. The effects of the central metals on the structures and properties of complexes 1–5 have been discussed. The electrochemical properties of complexes 1–3 and fluorescent sensing behaviors of 4–5 toward ethanol and nitrobenzene have been investigated in detail.

Graphical abstract: The various architectures and properties of a series of coordination polymers tuned by the central metals

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Publication details

The article was received on 08 Jan 2014, accepted on 26 Feb 2014 and first published on 27 Feb 2014


Article type: Paper
DOI: 10.1039/C4DT00064A
Citation: Dalton Trans., 2014,43, 8072-8082
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    The various architectures and properties of a series of coordination polymers tuned by the central metals

    X. Wang, J. Luan, H. Lin, M. Le and G. Liu, Dalton Trans., 2014, 43, 8072
    DOI: 10.1039/C4DT00064A

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