A non-covalent “click chemistry” strategy to efficiently coat highly porous MOF nanoparticles with a stable polymeric shell

•A non-covalent “click chemistry” strategy was developed to coat nanoMOFs.•Phosphorylated β-cyclodextrin derivatives efficiently coat nanoMOFs postsynthetically.•The higher the phosphate grafting density, the higher the coating stability.•The versatile coating does not affect the nanoMOF porosity, adsorption and release abilities.