Abstract
Nanoporous structures constructed by small molecular components exhibited vigorous materials potentials. While maintianing uniform porosity and functional properties, more applicable processing methods for the solid powders need to be considered and the improvement of binding interactions represents a preferable approach for structural flexibility. Here, by combining ionic interaction and host-guest inclusion, we constructed flexible supramolecular frameworks composing of inorganic polyanionic clusters, cationic organic hosts, and a bridging guest. The formed layer framework structure assemblies grew into nano-fibers and then supramolecular gels, donating highly convenient processability to porous materials. A simple spin-coating generated a new type of liquid separation membranes which showed structural stability for many liquids. The surface properties can be facilely modulated via filling a joystick liquid and then a hydrophilic/hydrophobic liquid into the porous frameworks, providing in-situ consecutive switchings for cutting liquids. This strategy extends the potential of flexible supramolecular frameworks for responsive materials in the laboratory and in industry.
Highlights
Nanoporous structures constructed by small molecular components exhibited vigorous materials potentials
Macroscopic/mesoscopic scale structuring of porous materials based on coordination and covalent bond from 0D to 3D structures depends on the deposition/growth of fine crystals with the assistance of template or support[8]
We have shown a strategy to fabricate flexible supramolecular framework self-assemblies
Summary
Nanoporous structures constructed by small molecular components exhibited vigorous materials potentials. The formed crosslinked organic-inorganic framework structure driven by electrostatic and host–guest interactions affords stable fibrous self-assemblies with flexible porosity in gel state, and alters the surface property of the prepared gel membrane quickly through the wetting of intermediate fluids to the amphiphilic channels in framework structure (Fig. 1b).
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