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Issue 19, 2013
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Coordination nanotubes self-assembled from cucurbit[7]uril and lanthanide cations

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Abstract

A series of complexes based on the macrocyclic ligand cucurbit[7]uril (Q[7]) with formulas {La2(H2O)12Q[7]}·2(ZnCl4)·2Cl·31H2O (1), {Ln2(H2O)12Q[7]}·2(ZnCl4)·2Cl·xH2O [isomorphous with Ln = Ce (2), Pr (3) and Nd (4), x = 25 (2), 29 (3) and 25 (4)], and {Ln2(H2O)10Q[7]}·2(ZnCl4)·2Cl·xH2O [isomorphous with Ln = Sm (5), Gd (6), Tb (7), Er (8), Tm (9), Yb (10) and Lu (11), x = 24 (5), 27 (6), 27 (7), 33 (8), 27 (9), 18 (10) and 29 (11)], have been synthesized by the self-assembly of Q[7] with the corresponding lanthanide species in the presence of ZnCl2. The single-crystal X-ray diffraction analyses reveal that the eleven complexes are separated into three types of coordination nanotubes given different coordination environments of the lanthanide(III) ions. The eleven complexes display interesting structural progressions, which are mainly ascribed to the effect of lanthanide contraction. Their thermal and IR properties were also examined.

Graphical abstract: Coordination nanotubes self-assembled from cucurbit[7]uril and lanthanide cations

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Publication details

The article was received on 23 Jan 2013, accepted on 14 Mar 2013 and first published on 14 Mar 2013


Article type: Paper
DOI: 10.1039/C3CE40147B
Citation: CrystEngComm, 2013,15, 3943-3950
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    Coordination nanotubes self-assembled from cucurbit[7]uril and lanthanide cations

    L. Liang, Y. Zhao, Y. Zhang, Z. Tao, S. Xue, Q. Zhu and J. Liu, CrystEngComm, 2013, 15, 3943
    DOI: 10.1039/C3CE40147B

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