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Bipyridine-triggered modulation of structure and properties of zinc-diphosphonates: coordination role vs. template rule

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Abstract

Two zinc-diphosphonates driven by 4,4′-bipyridine (4,4′-bipy), [Zn4(HEDP)2(4,4′-bipy)2]·4.5(H2O) (1) and (H2-4,4′-bipy)0.5·[Zn3(HEDP)(H2EDP)(H2O)]·1.5(H2O) (2), were solvothermally prepared (HEDP = CH3C(OH)(PO3)2, 1-hydroxyethylidenediphosphonate). Compound 1 features a layered structure with the Zn-HEDP chains as supramolecular units and 4,4′-bipy as interchain linkers. Compound 2 possesses a Zn-HEDP layer with protonated 4,4′-bipy as template. The structure differences between the two compounds are mainly ascribed to the distinct role of 4,4′-bipy in the process of in situ assembly. In compound 1, the 4,4′-bipy moiety acts as coordinative unit to participate in the formation of the resulting architecture. However, in compound 2, the protonated 4,4′-bipy serves as template to direct the formation of the final structure. The luminescence and proton conduction of the two compounds were investigated. Compounds 1 and 2 exhibit intense blue fluorescence; compound 2 has a proton conductivity of 2.61 × 10−4 S cm−1 at 100% relative humidity and 70 °C.

Graphical abstract: Bipyridine-triggered modulation of structure and properties of zinc-diphosphonates: coordination role vs. template rule

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Publication details

The article was received on 02 Dec 2017, accepted on 27 Dec 2017 and first published on 28 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT04542E
Citation: Dalton Trans., 2018, Advance Article
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    Bipyridine-triggered modulation of structure and properties of zinc-diphosphonates: coordination role vs. template rule

    Y. Ma, S. Han, Y. Mu, J. Pan, J. Li and G. Wang, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C7DT04542E

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