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Indium Phosphite-based Porous Solids Exhibiting Organic Sensing and a Facile Route to Superhydrophobicity
Y.-T. Chang, S.-H. Lo, C.-H. Lin*, L.-I. Hung*, and S.-L. Wang*
In searching for practical crystalline porous solids, two unique hybrid materials with featured functions, In‐bpy and In‐dpe, were prepared without deliberately designed organic linker units or complex post‐modification procedures. Composed of oxalate‐embedded metal phosphite (MPO) sheets and bipyridyl‐type ligands of varied molecular lengths, they show a common pillar‐layered topology but are the first well‐characterized organo‐MPOs to possess genuine porosity, substantiated by CO2 adsorption, and structural stability under harsh conditions. In‐bpy exhibits a turn‐on fluorescence signal when in contact with p‐xylene, making it the first MPO‐based sensing material with selectivity and recyclability. Furthermore, In‐dpe demonstrates a facile and unprecedented route to the superhydrophobicity of porous solids via a [2+2] photocycloaddition reaction between linker and foreign units. Our findings suggest that MPO may serve as a promising platform for hybrid frameworks to create many more functional porous materials.