A novel POM-based inorganic porous framework: Synthesis, structure and properties

•A novel POM-based inorganic porous framework was synthesized and characterized.•Compound 1 exhibits three-fold interpenetrated adamantane networks.•Compound 1 exhibits good thermal stability and active electrochemical behavior.

A novel POM-based inorganic porous framework, (H2en)3[Mn3P4Mo4O28] 1 (en = ethylenediamine),has been hydrothermally synthesized and characterized by elemental analyses, IR spectroscopy, TG analyses, and single crystal X-ray diffraction. In compound 1, PO4 groups link Mn atoms to form three-fold interpenetrated adamantane networks; the Mo-O helical chains connect with the adamantane networks through μ2-bridging oxygen atoms and PO4 groups. The PO4, MnO4, MnO6 and MoO6 polyhedrons share corners and connect with each other to form a 3-D complicated framework with 1-D channels. And the channels are filled with the diprotonated ethylenediamine cations. The magnetic behavior of 1 is antiferromagnetic coupling. Futhermore, compound 1 exhibits good thermal stability and active electrochemical behavior.

Graphical abstractIn compound 1, PO4 groups link Mn atoms to form three-fold interpenetrated adamantane networks, which are further linked by the Mo-O helical chains through μ2-bridging oxygen atoms and PO4 groups. The PO4, MnO4, MnO6 and MoO6 polyhedrons share corners and connect with each other to form a 3-D complicated framework with 1-D channels filled by diprotonated ethylenediamine cations. This POM-based inorganic porous framework shows remarkable stability and excellent electrocatalytic activity.Figure optionsDownload full-size imageDownload as PowerPoint slide