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Issue 27, 2013
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Reactant ratio-modulated entangled Cd(II) coordination polymers based on rigid tripodal imidazole ligand and tetrabromoterephthalic acid: interpenetration, interdigitation and self-penetration

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Abstract

By adjusting the molar ratio of the reactant metal salt and ligands, three new entangled coordination polymers, [Cd(tib)(tbta)(H2O)]n (1) and [Cd(Htib)(tbta)·Htbta·2CH3OH]n (2) and [Cd2(tib)2(tbta)2(H2O)·10H2O]n (3) (tib = 1,3,5-tris(1-imidazolyl)benzene and H2tbta = tetrabromoterephthalic acid), have been prepared and structurally characterized by X-ray diffraction analyses. Complex 1 is a 2-fold interpenetrated three-dimensional (3D) 8-connected uninodal net with rare hex topology. Complex 2 presents a 2D 63-hcb network, which is interdigitated with each other to form the 3D supramolecular framework stabilized hydrogen bonds and halogen bonds. Interestingly, an unprecedented hydrogen-bonded [(Htbta)2(CH3OH)4] cluster was unmasked in the void of 2. Complex 3 is a complicated 3D self-penetrated framework with a point symbol of {4·6·8}{4·65·84}{66}, which can be seen as a pair of 2-fold interpenetrated networks by breaking bidentate-bridging tib ligand. The comparative study revealed that 1–3 are particularly sensitive to the metal–ligand ratio in this system. The thermal stabilities and photoluminescence behaviors of 1 and 2 were also discussed.

Graphical abstract: Reactant ratio-modulated entangled Cd(ii) coordination polymers based on rigid tripodal imidazole ligand and tetrabromoterephthalic acid: interpenetration, interdigitation and self-penetration

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Publication details

The article was received on 10 Feb 2013, accepted on 06 May 2013 and first published on 10 May 2013


Article type: Paper
DOI: 10.1039/C3CE40273H
CrystEngComm, 2013,15, 5552-5560

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    Reactant ratio-modulated entangled Cd(II) coordination polymers based on rigid tripodal imidazole ligand and tetrabromoterephthalic acid: interpenetration, interdigitation and self-penetration

    L. Wang, Z. Yan, Z. Xiao, D. Guo, W. Wang and Y. Yang, CrystEngComm, 2013, 15, 5552
    DOI: 10.1039/C3CE40273H

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