Host-guest encapsulation of organosulphonate ligands into a host framework assembled from Keggin polyoxometalate anions and in situ generated organonitrogen cations

A three-dimensional supramolecular framework constructed by [SiMo12O40]4− Keggin anions and in situ generated mix H2pip2+ and H2pesp ligands is reported, within which the [SiMo12O40]4− Keggin anions and in situ generated H2pip cations self-assemble into a hybrid porous host via intensive fourfold hydrogen bonds and the H2pesp precursor ligands trap in the void of host framework as guests.