Assembly of four new supramolecular compounds based on Keggin phosphomolybdate and different organocations

Four novel supramolecular compounds based on Keggin phosphomolybdate and different organocations: (H2bpy)1.5[PMo12O40]·1.5H2O 1, (H2bpi)(Hbpi)[PMo12O40] 2, (H2bbi)(Hbpi)[PMo12O40] 3, (H2bbi)(Hbbi)[PMo12O40] 4, (bpy = 4,4′-bipyridine, bpi = 1,1′-(1,3-propanediyl)bis(imidazole), bbi = 1,1′-(1,4-butanediyl)bis(imidazole)) have been hydrothermally prepared and characterized by elemental analysis, IR, TG, XRD and single-crystal X-ray diffraction. Crystal data analysis revealed that all the compounds are composed of discrete organonitrogen cations and [PMo12O40]3− polyanions and exhibits interesting supramolecular frameworks from one to three dimensions via electrostatic and hydrogen bond interactions. Additionally, their electrochemical characters, electrocatalytic behaviors and solid state fluorescent properties at room temperature have been investigated in detail.

Different organonitrogen guides the structures of their corresponding salts with [PMo12O40]3−. Four new supramolecular assemblies of salts of [PMo12O40]3− from different mono and diprotonated organonitrogen cations prepared under different reaction conditions are presented.Figure optionsDownload as PowerPoint slideHighlights
► Supramolecular compounds based on [PMo12O40]3− and organocations are reported.
► In 1, H2bpy and H2O form criss-cross chains, [PMo12O40]3− are embedded in chambers.
► 2–4 Display different 3D structures for conformational change of bpi or bbi.
► Compounds 1–4 exhibit good electrocatalytic and fluorescent properties.