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Two-dimensional layered lanthanide diphosphonates: synthesis, structures and sensing properties toward Fe3+ and Cr2O72−

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Abstract

A series of lanthanide diphosphonates, namely Ln(HL)(H2O)2 (Ln = Nd 1, Eu 2, Tb 3 and Er 4), have been synthesized from a semirigid diphosphonate ligand, (5-methyl-1,3-phenylene)bis(methylene)bisphosphonic acid (H4L). These lanthanide diphosphonates have been systematically characterized by using powder and single-crystal X-ray diffraction, elemental analysis, TGA, IR, UV-vis absorption and luminescence techniques. The single-crystal XRD measurements revealed that these compounds all have two-dimensional layered crystal structures. Among these four compounds, 1, 2 and 4 are isostructural and crystallize in the P21/c space group, whereas compound 3 crystallizes in the P21 space group. These compounds display the characteristic emissions of the respective lanthanide ions. The sensing properties of compound 3 were investigated which revealed that it could be used as a luminescent probe for Fe3+ and Cr2O72− with good selectivity and sensitivity.

Graphical abstract: Two-dimensional layered lanthanide diphosphonates: synthesis, structures and sensing properties toward Fe3+ and Cr2O72−

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Publication details

The article was received on 01 Sep 2019, accepted on 30 Nov 2019 and first published on 02 Dec 2019


Article type: Paper
DOI: 10.1039/C9DT03531A
Dalton Trans., 2020, Advance Article

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    Two-dimensional layered lanthanide diphosphonates: synthesis, structures and sensing properties toward Fe3+ and Cr2O72−

    X. Hou, C. Yan, X. Xu, A. Liang, Z. Song and S. Tang, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT03531A

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